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A very thin plano convex lens of refract...

A very thin plano convex lens of refractive index `mu = 3//2` and radius of curvature 15 cm kept fixed as shown

A point object P starts moving with constant speed 4 cm/s parallel to optical axis from the shown position at t = 0. The average speed of image of object from t = 0 to t = 6 sec is

A

20 cm/s

B

greater than 20 cm/s

C

less than 20 cm/s

D

can't say

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The correct Answer is:
B
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RESONANCE ENGLISH-DAILY PRACTICE PROBLEM-DPP No.38
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