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An object is present on the principal ax...

An object is present on the principal axis of a concave mirror at a distance `30cm`from it.Focal length of mirror is`20cm`

If object starts moving with `2cms^(-1)` along principal axis towards the mirror then

A

image starts moving with`8cms^(-1)`away from the mirror

B

image starts moving with`8cms^(-1)` towards the mirror

C

image starts moving with`4cms^(-1)`towards the mirror

D

image starts moving with`4cms^(-1)`away from the mirror

Text Solution

Verified by Experts

The correct Answer is:
A
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