Question

The image of an object, placed at a distance of 25 cm. from
convex mirror is obtained half as the size of object. Find the
focal length of mirror?​

Answer 1

Answer:

In case of convex mirror m=-v/u

Given,. m= -v/u=0.5

U=-25 cm

So, m=-v/-25=0.5

v=12.5

Now using mirror formula.

1/v+1/u=1/f

1/12.5+1/-25=1/f

2.5/62.3=1/f

f=25 cm.

So, the required focal length of the mirror is 25 cm.

Answer 2

Answer:

f=25 cm. So, the required focal length of the mirror is 25 cm.

Explanation:

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