MEDIUM
12th West Bengal Board
IMPORTANT
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An object is placed at a distance x1 from the principal focus of a concave mirror on the principal axis. The image is formed at a distance x2 from the principal focus. The focal length of the mirror is,

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Important Questions on Reflection of Light

HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 10
An object is placed at a distance of 60 cm from a convex mirror. The size of the image is one third of the size of the object. The radius of curvature of the mirror is
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 11
Two plane mirrors (infinitely extended) are kept in parallel with a separation. An object is also kept in between the two mirrors, such that light from the object can be reflected from both the mirrors. Now the total number of virtual images formed by the mirrors is
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 12
A small linear object of length l  is placed along the axis of concave mirror of focal length f  The distance of the object from the mirror is u. Approximate size 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 13
The focal length of a concave mirror, in vacuum, is 2 m. The focal length of the same mirror in a medium of refractive index 2.76 is?
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 14
A 2 cm tall object is placed 15 cm in front of a concave mirror of focal length 10 cm. What is the size and nature of the image ? 
EASY
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 15
The mirror used as a view-finder is 
MEDIUM
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 16
To form a virtual and magnified, image the mirror required is
HARD
12th West Bengal Board
IMPORTANT
A Text Book of PHYSICS PART 2 : CLASS 12>Chapter 12 - Reflection of Light>EXERCISE 12>Q 17
Object distance = u and focal length of a spherical mirror =f. What the magnification is?  Assume the object is small.