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12th West Bengal Board
IMPORTANT
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Object distance = u and focal length of a spherical mirror =f. What the magnification is?  Assume the object is small.

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Important Questions on Reflection of Light

EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 18
If an object is kept at a distance x from a concave mirror of radius of curvature r, the image distance is
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 19
The minimum height of a plane mirror through which a person can see the full image of his body is
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 20
If two mirrors are kept at 60° to each other, the number of images formed by them is
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 21
To get three images of a single object, one should have two plane mirrors at an angle of
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 22
A car is fitted with a convex side-view mirror of focal length 20 cm. A second car 2.8 m behind the first car is overtaking the first car at a relative speed of 15 ms-1. The speed of the image of the second car as seen in mirror of first one is:
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12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 23
Image of an object, approaching a convex mirror of radius of curvature 20 m along its optical axis is observed to move from 253 m to 507 m in 30 s. What is the speed of the object in kmh-1.
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 24

An object moving at a speed of 5 m/s towards a concave mirror of focal length f=1 m is at a distance of 9 m. The average speed of the image is

MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 25

A person sees his virtual image by holding a mirror very close to the face. When he moves the mirror away from his face, the image becomes inverted. What type of mirror he is using ?