A motor car is fitted with a rear view mirror of focal length 20 cm. A second motor car 2 m broad and 21.6 m
high is 6 m away from first car. Find the position of second car as seen in the mirror of the first car.
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Answer:
Given
Distance of Second motor car from first= 6m=
- 600 cm
Focal length of convex mirror =f= 2Ocm
Image dstance =V=?
By mirror formula
1/f-1/v+1/u
1/v=1/f-1/u
1/v= 1/20+1/600
=600+20/12000
v 19.35cm
The position of second car as seen in the
mirror of first car is 19.35cm behind the
mirror.
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