Optics Question 796

Question: A cube of side 2 misplaced in front of a concave mirror of focal length 1m with its face P at a distance of 3 m and face Q at a distance of 5 m from the mirror. The distance between the image efface P and Q is

Options:

A) 1m

B) 0.5m

C) 0.5m

D) 025m

Show Answer

Answer:

Correct Answer: D

Solution:

[d] For P:1v+1u=1f

or 1vP+13=11 or vP=32m

For Q:1vQ+15=11 or vQ=54m

So horizontal distance between image of P and Q is 0.25m



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