Question

A spherical mirror produces an image of magnification -1 on a screen placed at a distance of 40 cm from the mirror: (i). Write the type of mirror. (ii). What is the nature of the image formed? (iii). How far is the object located from the mirror? (iv). Draw the ray diagram to show the image formation in this case.

Answer 1

Explanation:

m=-1

u=-40cm

the mirror is concave as m is negative ie it forms real and inverted image

m=-v/u

-1=-v/-40

v=-1×40

=-40cm

1/v+1/u=1/f

1/-40-1/40=1/f

-1-1/40=1/f

-20=f