Question

Example 10.2
mirror of focal length 15.0 cm. At what distance from the mirror
An object, 4.0 cm in size, is placed at 25.0 cm in front of a concave
e nature and the size of the image.


Tenth class pls answer​

Answer 1

Answer:

focal length=f=-15cm

object distance=u=-25

image distance=v=?

h¹=?

h²=4c

mirror formula

1/v +1/u =1/f

1/f =1/u +1/v

1/-15 =1/-25 +1/v

1/-15 +1/25 =1/v

1/v =25-15/-375

m=-v/u=h¹/h²

m=150/25=-6cm

thus to get image of object sharp it has to be placed at 37.5 cm

size of image is 6cm