Question

if ramesh stands 30 m away from a concave mirror and focal length is 20 m .Raju stands 30 m from a plane mirror .find the distance between the image of Ramesh and raju
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Answer 1

Explanation:

u= -30 cm

f= -20 cm

By using mirror formula,

1/v + 1/u = 1/f

1/v + 1/-30 = 1/-20

v= -60 cm

negative sign indicates that image is in front of the mirror

Therefore,

The distance between image and object = 60–30 = 30cm