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A thin convex lens of focal length 'f' i...

A thin convex lens of focal length 'f' is put on a plane mirror as shown in the figure. When an object is kept at a distance 'a' from the lens - mirror combination,its image is formed at a distance `(a)/(3)` in front of the combination . The value of 'a' is :-

A

(a)`2f`

B

(b)`3f`

C

(c)`f`

D

(d)`(3)/(2) f`

Text Solution

Verified by Experts

The correct Answer is:
D
`(1)/(f_("eq")) = (1)/(f_(m)) - (2)/(
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