assertion mirror formula can be applied to a plane mirror

Arrange the following steps in sequential order to determine the nature . Students answered this question incorrectly. (a) 4 (b) 6 (c) 5 (d) 8. 48° c. the angle between the incident ray and the reflected ray! For plane mirrors, the object distance (often represented by the symbol d o) is equal to the image distance (often represented by the symbol d i). Answer: Concave Lens always has linear magnification less than one, because it always gives diminished images. Assertion: Mirror formula can be applied to a plane mirror. Consider a light-ray incident on a plane mirror, as shown in Fig. Consider a light-ray incident on a plane mirror, as shown in Fig. Answer/ Explanation. Reason (R): A plane mirror is a spherical mirror of infinite focal length. Mirrors reverse the direction of the image in an equal yet opposite angle from which the light shines upon it. ∴ . (a) a concave mirror. Understand the definition of a plane mirror and discover its common uses and applications. ∴ . Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of . The kinetic energy T of the pendulum is equal to 2 and the potential energy U is given by The Lagrangian for this system is thus equal to 2 The equation of motion can now be determined and is found to be equal to . = 1.5 meter. Assertion : Plane mirror may form real image. r! 9th Science Reflection Of Light Exercise Question 2. Reason: Laws of reflection are strictly valid for plane surfaces, but not for large spherical surface. (b) A convex mirror always forms a virtual image, which does not depend on the position of the object. A man standing in front of a spherical mirror, finds his image having a very small head, a fat body and legs of normal size. Explanation: 1. (d) convex, concave and plane mirror. Assertion : Mirror formula can be applied to a plane mirror. b. Thus the principal focus of a convex mirror is behind the mirror, as is the centre of curvature, but eqn. Enantiomers are mirror image molecules that are not superimposible. Why is the assertion true? [Delhi] Answer. Complete step by step solution: Given the angle is θ. Use the mirror-formula to derive that: (a) The real image of an object placed between f and 2f of a concave mirror is made away from 2f. a.) Answer (1 of 8): For plane mirror the usual mirror formula can be used usual mirror formula involves object distance u image distance v and f -the focal length which is equal to R/2 where R is the radius of curvature. Q 66. It results in 2x displacement of the virtual object: U2-U1=2x We then use this formula and the postulates of special relativity to show that the moving mirror is contracted along the direction of its motion by the usual Lorentz factor. Figure 2.2. How many images will be observed by him? Reducing agent is an element or a compound that loses electrons. Concave mirror or also called the converging mirror which have an inward bent surface. r! Identify oxidizing & reducing agent in the following reaction. Report an issue. The law of reflection states that the incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane. 22. 0. Example: Find the image of the given object. Plane mirror. The reflecting surface of such mirrors can be considered to form a part of the surface of a sphere. Answer: A very small head: Convex mirror A fat body: Concave . Answer (a) Q.10. 61. Reason (R): If object is fixed and plane mirror is moved through a distance x then the image also moves through a distance 2x. Mark the correct choice as:Assertion : Mirror formula can be applied to a plane mirror.Reason : A plane mirror is a spherical mirror of infinite focal length.a)Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).b)Both . Q24.Assertion (A) : Mirror formula can be applied to a plane mirror. (c) Large size concave mirror are used to concentrate sunlight to produce heat in solar furnaces. They have a negative value of focal length in sign convention and can form both virtual and real images based on the position of the object. 90°"! . Two rays emerge from point P, strike the mirror, and reflect into the observer's eye. 40 cm C. 60 cm D. 80 cm E. 120 cm ∴ O = 360 ∘ − 2 θ. where, O is the deviation, i.e.. 300 ∘. Both angles are measured with respect to the normal to the . Answer: (d) If assertion is false but reason is true. The law of reflection states that the incident ray, the reflected ray, and the normal to the surface of the mirror all lie in the same plane. List four properties of the image formed by a plane mirror. To understand how this happens, consider (Figure). (x) Assertion: mirror formula can be applied to a plane mirror . MCQs from CBSE Class 10 Science Chapter 10: Light - Reflection and Refraction. Reason (R) : A plane mirror is a spherical mirror of infinite focal length. An object is placed 20 cm in front of a plane mirror. As a result, the driver can view much larger than would be possible with a plane mirror. A man walks in front of the mirror along a line that is parallel to the mirror and twice as far from it as the bulb. Reason: Because convex mirror's field of view is small and images formed are virtual, erect and diminished. Reason (R): A convex mirror has much larger field of view than a plane mirror. 84° 3. Thus it provides a wider field of view to the driver. (a) between the pole and the focus of the reflector. Convex mirrors are normally used as rear-view mirrors in vehicles. 3. Reason : A plane mirror is a spherical mirror of infinite focal length. Reason: A convex mirror has a much larger field of view than a plane mirror or a concave mirror. Figure 1.27 Huygens's principle applied to a plane wave front striking a mirror. The characteristics of the images formed by plane mirrors are: The image formed by a plane mirror is virtual and erect. (b) a convex mirror. What is the meaning of this statement? Assertion (MA): It is not possible to see a virtual image by eye. ∴ u = -v. The above derivation proves that the image distance is equal to the object distance and the image is formed behind the mirror. Assertion and Reason Questions for Class 10 Science Light. Reason : A virtual image is always formed behing the plane mirror. Write the mirror formula with respect to spherical mirrors. Reason (R) : A plane mirror is a spherical mirror of infinite focal length. They have a wider field of view as they are curved outwards. The number of images formed by two plane mirrors depends on the angle between the mirror. 5.Find the angle of incident and angle of reflection from the given diagram : The total angle between the straight-line path and the . Fe2O3 + 3CO -. answered Apr 6, 2018 by BISHNU (32.1k points) selected Apr 12, 2018 . i! 56. For this system, there is only one coordinate we need to specify, namely the polar angle q. The mirror is a polished surface which reflects the incident light to form the image. (R) A plane mirror is a spherical mirror of a finite focal length. The focal length of a plane mirror is infinity. 374. A plane mirror is a mirror with a flat ( planar) reflective surface. Q26. Light reflected off a mirror strikes the observer's eyes. The greatest distance he can walk and still see the image of the bulb is: A. Reason : Plane mirror forms virtual image, if object is real. That is the image is the same distance behind the mirror as the object is in front of the mirror. An object is placed at a distance of 10 cm in front of a plane mirror, then the distance of image from mirror will be (a) 5 cm (b) 10 cm (c) 20 cm (d) 0 Ans : (b) 10 cm The distance of image is equal to the distance of object from mirror. (a) Farmers wh. If a light ray reflects off a plane mirror at an angle of 35° to the normal, what was the angle of incidence of the ray?! (i) Assuming that the refractive index of glass is 1.5, find the angle of refraction for this ray in the glass. ii. If the reflecting surface is the outer side of the sphere, the mirror is called a convex mirror.If the inside surface is the reflecting surface, it is called a concave mirror.. Symmetry is one of the major hallmarks of many optical devices, including mirrors and lenses. Laws of reflection can be applied to any type of surface. 9. An object is placed in front of a mirror. Assertion(A): Mirror formula can be applied to a plane mirror. The distance . A mirror is an object that reflects an image.Light that bounces off a mirror will show an image of whatever is in front of it, when focused through the lens of the eye or a camera. Q.23) Image that is created in plane mirror is virtual' is a true statement of plane mirror image A. 9. SURVEY. Two mirrors can produce multiple images. Question 52. Questions Example 10.1 - A convex mirror used for rear-view on an automobile has a radius of curvature of 3.00 m. If a bus is located at 5.00 m from this mirror, find the position, nature and size of the image View Answer Example 10.2 - An object, 4.0 cm in size, is placed at 25.0 cm in front of a concave mirror of focal length 15.0 cm. It is formed at the same distance behind the mirror as the object is in front of the mirror. In general, any curved surface . i! The distance from the image to the mirror is always identical to the distance from the object to the mirror. Assertion: A convex mirror is used as a driver's mirror. A ray of light strikes a plane mirror PQ at an angle of incidence of 30°, is reflected from the plane mirror and then strikes a second plane mirror QR placed at right angles to the first mirror. while two compounds with the same formula but different connectivities of atoms are called _____ isomers. We derive a formula for the law of reflection of a plane-polarized light beam from an inclined flat mirror in uniform rectilinear motion by applying the Huygens-Fresnel principle. (ii) Complete the diagram by sketching the path of the ray through the glass and out on the other side. The tangent to these wavelets shows that the new wave front has been reflected at an angle equal to the incident angle. 10.3.3 Refraction by Spherical Lenses. Assertion (A): Mirror formula can be applied to a plane mirror. Light from a laser strikes a plane mirror at an angle of 38° to the . Images in a plane mirror are the same size as the object, are located behind the mirror, and are oriented in the same direction as the object (i.e., "upright"). What is the object distance from mirror? 1 Answer. . Q25. Answer: (c) Number of images formed by two plane mirrors inclined at an angle 60° when a light bulb is placed in midway between them is N = 360°/60° - 1 . Assertion(A): The formula connecting u, v and f for a spherical mirror is valid in all situations for all spherical mirrors for all positions of the object. Furthermore, the angle of reflection is equal to the angle of incidence . 10. ∴ . 20 cm B. In other words, Reflection is the change in direction . 10. Reason (R) : Only real images can be photographed. And inverted vacancy 2021 for 62 posts, apply for 700 Nursing officer posts: exam! The mirror formula is \frac{1}{v}+\frac{1}{u}=\frac{1}{f} where, u,v and f are the distance of the object from the mirror, the distance of the image from the mirror, and, the focal length, respe. Assertion: A plane mirror can form a real and inverted image. At what distance from the mirror should a screen be . 9. Answer. Assertion(A) : Mirror formula can be applied to a plane mirror. Assertion: The mirror used in search lights are concave spherical. Assertion: For observing the traffic at a hairpin bend in mountain paths a plane mirror is preferred over convex mirror and concave mirror. If you stand a distance of 2 meters from a plane mirror, you must focus at a location 2 meters behind . Assertion(A) : The formula connecting u, v and f for a spherical mirror is valid in all situations for all spherical mirrors for all positions of the object. And object distances in this assertion mirror formula can be applied to a plane mirror of a convex mirror and the magnification image formed a! RTW69. State the developmental goals of following categories of persons. You have so far studied the image formation by a plane mirror, a concave mirror and a convex mirror. Question 40: Two plane mirrors are placed opposite to each other and a candle is placed in between, the image formed will be: (a) real and infinite (b) virtual and infinite Figure shows a ray of light meeting the glass of the window of a car at an angle of incidence of 40 ° °. Check all that apply. Reason: In concave spherical mirror the image formed is always virtual. Measurements are made for two positions of the mirror. . The image in a plane mirror has the same size as the object, is upright, and is the same distance behind the mirror as the object is in front of the mirror. This statement is true for the plane mirror . Answer: The mirror formula is \(\frac{1}{f}=\frac{1}{u}+\frac{1}{v}\) where u = distance of the object from the pole of the mirror v = distance of the image from the pole of the mirror f = focal length of the mirror. Convex mirror. . Yes, a plane mirror can be called a spherical mirror Normal of infinite radius of curvature. Assertion (A) : Mirror formula can be applied to a plane mirror. It is laterally inverted. Assertion (A) : The image formed by a concave mirror is certainly real if the object is virtual. Reason (R): A plane mirror is a spherical mirror of infinite focal length. A thin converging lens is used to produce, on a screen, a focused image of a candle. Note that we use the law of reflection to . Reason (R) : The image formed by a concave mirror is certainly virtual if the object is real. We draw first point A' which is the image of point A, we placed it one unit away from the mirror, then points B' and C' are placed with the same way. For light rays striking a plane mirror, the angle of reflection equals the angle of . A mirror formula can be defined as the formula which gives the relationship between the distance of object 'u', the distance of image 'v', and the focal length of the mirror 'f'. 90° " 42° ! It cannot be received on a screen. Assertion (A): Plane mirror may form real image. (c) a plane mirror. 21. 11. The most commonly used type of curved mirror is the spherical mirror. The mirror is moved 2 cm towards the object. The mirror displacement x is known. 10. the mirror! There are two types of spherical mirrors for which the mirror formula is used. 35° 4. where u is the object distance, v is the image distance, f is the focal length and R is the radius of curvature. Assertion (A): Mirror formula can be applied to a plane mirror. A plane mirror is a mirror with a flat surface that reflects the light rays producing a virtual image. The reference beam reflects at R, L is the test lens, and the mirror M is placed slightly away from the lens focal point, at distance U1. Q1: In which type of lens linear magnification is always less then one? So, as we know that the formula during the deviation:-. 10. 1. the form of equation is 1/u + 1/v = 1/f = 2/R the question is what is ra. i, mirror! Reason (R) : A plane mirror is a spherical mirror of infinite focal length. Light reflects off mirrors according to the law of reflection. Reason (R): Laws of reflection . 120 seconds. 0 votes . What type of mirrors are used in these three parts? Dec 10,2021 - Direction: In the following questions, a statement of assertion (A) is followed by a statement of reason (R). Reason: A convex mirror has a much larger field view than a plane mirror or a concave mirror. Assertion: The formula connecting u, v and f for a spherical mirror is valid only for mirrors whose sizes are very small compared to their radii of curvature. A full length image of a distant tall building can definitely be seen by using. We get-. ray optics and optical instruments; Share It On Facebook Twitter Email. . Furthermore, the angle of reflection is equal to the angle of incidence . A student placed a light bulb in midway between the two plane mirrors inclined at an angle of 60°. iii. A plane mirror reflects almost all the light that falls on it. Various focused images are produced on the screen by moving the lens and the screen backwards and forwards. A curved mirror, on the other hand, can form images that may be larger or smaller than the object and may form either in front of the mirror or behind it. Assertion (A) Mirror formula can be applied to a plane mirror. In plane mirrors always virtual image is formed. Ungraded. Q. ONE MARK TYPE QUESTIONS 11. So, 360∘60∘'=' 6, where 6 is an even number. It is generally true that for a simple molecule such as the one shown, exchange of any of the two substituents will convert the structure to the ______, whereas an exchange of three of the substituents will convert the structure to the _____. Define magnification with respect to spherical mirrors. Ans : (a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A). The . 60. Consider the example of a plane pendulum. Which describe how light interacts with plane mirrors to form images? . A. . i #! Apply this logic to determine whether the incident rays are parallel, diverging or converging. Q2: John obtained a magnification of 1 with concave mirror of focal length 10cm. Its size is equal to that of the object. A light bulb burns in front of the center of a 40-cm wide plane mirror that is hung vertically on a wall. Mirror formula is stated below: We know that focal length of plane mirror = ∞. 1. For plane mirrors, we can apply the usual mirror formula. So if a person stands 2.0 meters in front of the mirror, then the image will be located an identical 2.0 meters behind the mirror. Mirror formula cannot be applied to a plane mirror. In torches, search lights and headlights of vehicles the bulb is placed. Q.24) Which one of following is a true statement about reflection? You have so far studied the image formation by a plane mirror, a concave mirror and a . These sign conventions are applied to obtain the mirror formula and solve related numerical problems. (d) both concave as well as plane mirror. Two plane mirrors kept at 60° form 5 images of an object kept between them. Assertion (A): Mirror formula can be applied to a plane mirror. Such mirrors, whose reflecting surfaces are spherical, are called spherical mirrors. Assertion is true but reason is false. A. point on which ray touches mirror is called critical point Assertion: For observing the traffic at the hairpin bend in the mountains a plane mirror is preferred over convex or concave mirror. As that of the concave mirror: this is a mirror is preferred over convex concave. (c) A small image, always in shape by a convex mirror, is formed between the pole and focus of the mirror. Objects placed in front of plane mirrors will have a corresponding image located behind the mirror. Right C. Neither right nor wrong D. Wrong. Convex mirror forms erect and diminished image of vehicles coming behind. Assertion (A): Mirror formula can be applied to a plane mirror. Stereoisomers Constitutional isomers. A. A plane mirror showing the virtual image of an urn nearby. The mirror formula derivation is provided here . Click hereto get an answer to your question ️ The formula connecting u, v and f for a spherical mirror is valid only for mirrors whose sizes are very small compared to their radii of curvature. Answer: (c) Explanation: Plane mirror gives image of same size, concave mirror enlarges the image and convex mirror gives diminished image. Answer: m = 1.Therefore u = v. Apply it in mirror formula, you will get v = 20 cm. 8. Remedial measures- Students will be taught the nature of image formed by mirrors and trained to answer assertion and reasoning type of questions. Q. The parallel beam of ray projected on the plane mirror then there will be no deviation and the beam will get reflected. A diagram of an object in two plane mirrors that formed an angle bigger than 90 degrees, causing the object to have three reflections. When two plane mirrors are kept at 60 degree to each other we get dash? In the case of the convex mirror similar arguments apply except that in this case the rays are reflected as if to appear to come from a point F on the principal axis behind the mirror (Fig. Reason (R): A plane mirror is a spherical mirror of infinite focal length (a) Both assertion and reason are true and reason is the correct explanation of the assertion Therefore, the distance of image from mirror is 10 cm. (d) A virtual and large image . i!! . We can define two general types of spherical mirrors. Properties of image formed by a plane mirror: It is always virtual and erect. The image is 1.5 meters behind the mirror. 19.1a). (19.1) again applies. Light passes through a mirror to a common point behind the mirror. Reason: A plane mirr. As per the question- A ray reflected successively from two plane mirrors inclined at a certain angle undergoes a deviation of 300 ∘ .Here, we have to find the number of observable image with respect to the given statement-. Topics: Question 17. Answer: How does the magnification of the image change as we move an object towards a concave mirror? Assertion : Mirror formula can be applied to a plane mirror. Question 18. Draw the ray diagram of a plane mirror that shows the image formation by an extended real object. Concave . Reason (R) : A plane mirror is a spherical mirror of infinite focal length. Reason (R): A plane mirror is a spherical mirror of ∞ focal length. Assertion(A): Higher is the refractive index of a medium or denser the medium, lesser the velocity of the light in that medium. Answer . The wavelets shown were emitted as each point on the wave front struck the mirror. Curved Mirrors. As I said before, image of the object is formed behind the mirror with the same distance of object. Complete step by step answer: The focal length of a plane mirror is infinity. These mirrors are preferred because they always give an erect image. The image formed by a plane mirror is of the same size as the object. (a) Three images of a plastic head are visible in the two mirrors at a right angle. Light strikes a mirror and is then reflected off the mirror. 0. . =) 1/v + 1/u = 1/f = 2/R. Assertion(A): Mirror formula can be applied to a plane mirror. Both angles are measured with respect to the normal to the . Assertion: For observing the traffic at a hairpin bend in mountain paths a plane mirror is preferred over convex mirror and concave mirror. A plane of symmetry is a mirror plane that cuts a molecule in half so that one half of the molecule is a reflection of the other half. Reason (R): A plane mirror is a spherical mirror of ∞ focal length. Reason: A plane mirror is a spherical mirror of infinite focal length. Assertion(A) : For observing traffic at back, the driver mirror is convex mirror. Reason (R): Plane mirror forms virtual image, if object is real. Assertion(A) : Mirror formula can be applied to a plane mirror. Reason (R) : A convex mirror has much larger field of view than a plane mirror. The angle of reflection at the second mirror is _____. Focal length of a plane mirror is infinite. Calculation: To calculate the Focal length of the given mirror, substitute the value of Radius of Curvature (R) in the f = R 2 f = R 2. Reason : A convex mirror has a much larger field of view than a plane mirror or a concave mirror. 2! . Suppose that the ray had continued, through the mirror, in a straight line it would make an angle θ with the surface of the mirror. The mirror formula is applicable for both, plane mirrors and spherical mirrors (convex and concave mirrors). The image formed by a plane mirror is at the same distance behind the mirror as the object is in front of the mirror. In order to study and observe the reflection of light, we need an apparatus that can produce a thin beam of light. Correct 134. In this way, convex mirrors enable the driver to view much larger area than would be possible with a plane mirror. May be right or may be wrong B. 56. Reason : A plane mirror is a spherical mirror of infinite focal length. A ray of light that is incident on to the surface of a plane-mirror is reflected with the angle of incidence equal to the angle of reflection. Reason (R): Refractive index is inversely proportional to the velocity. (b) A single object reflecting from two mirrors at a right angle can produce three images, as shown by the green, purple, and red images. Was this answer helpful? The process of bouncing back light rays which fall on the surface of an object, is called the reflection of light. Assertion Reasoning question for class 10 Light with answers is prepared on latest exam pattern. With respect to the nature of image formed by a plane mirror forms virtual image is identical... ( b ) 6 ( c ) 5 ( d ) if assertion is false but reason is true the... 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