Question

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

Answer 1

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Answer 2

Answer:

f=25

Explanation:

In case of convex mirror m=-v/u

Given:

m=-v/u=0.5

u=-25cm

So,m=-v/-25=0.5

V=12.5

Now, by using mirror formula

1/v+1/u=1/f

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

2.5/62.3=1/f

f=25

So,the require focal length is 25cm

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