A car is fitted with a convex side-view ...

A car is fitted with a convex side-view mirror of focal length 20 cm. A second car 2.8m behind the first car is overtaking the first car at a relative speed of 15 `m/s`. The speed of the image of the second car as seen in the mrror of the first one is:

`1/15m//s`

10m/s

15m/s

`1/10 m/s`

Text Solution

Verified by Experts

The correct Answer is:

`1/f=1/u - 1/v`, here f=20cm,u=280cm

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