Question

find the distance of image having 20 cm focal length

Answer 1

Here Is Your Answer _
Since it is a convex mirror , therefore u = -ve and f = +ve

Therefore formula for mirror is

1/v+1/u=1/f

1/v+1/-20=1/25

1/v=1/25–1/-20

1/v=1/25+1/20

1/v=4+5/100

1/v=9/100

v=100/9

v=11.111cm

Therefore, the image is formed 11.111cm at the back of the mirror. The nature of the image is that it forms virtual , erect and diminished image.

✓ Vote High
✓ Rate High
✓ Follow Me !
# ayushanand8947 @Brainly

Answer 2

You can use the above formula put value in place of f=20cm.