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The velocity of image w.r.t ground in th...

The velocity of image w.r.t ground in the below figure is

A

45 m/s and approaches the mirror

B

45 m/s and moves away from the mirror

C

60 m/s and approaches the mirror

D

60 m/s and moves away from the mirror

Text Solution

Verified by Experts

The correct Answer is:
A
For velocity component along the principle axis
`(V_(1M))_(II)=v^(2)/u^(2) (vel)_(obj)`
apply mirror eqn.
`1/v +1/u =1/fimplies 1/v+ 1/(-20)=1/(-30)`
`impliesv=+60cmimpliesm=-v/u=(-60)/(-20)=3`
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NARAYNA-RAY OPTICS AND OPTICAL INSTRAUMENTS -EXERCISE-2 (C.W)(REFLECTION)
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  5. Two plane mirrors A and B are aligned parallel to each other, as shown...

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  7. A short linear object of length b lies along the axis of a concave mir...

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  9. A car is fitted with a convex side-view mirror of focal length 20 cm. ...

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  10. The velocity of image w.r.t ground in the below figure is

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