Question

When an object is placed at a distance of 50cm from a concave mirror , the magnification produced is -1/2. where should the object be placed to get a magnification of,-1/5 ?

Answer 1

Answer:

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Object distance should be 125 cm

u = -125 cm

Explanation:

u = -50 cm

m =-1/2

W.K.T., m=v/u

-1/2 = v/-50

v = 25 cm

Now, m=-1/5, v=25 cm

-1/5 = 25/u

u = -125 cm