Question

1. Find the distance of the image when an object is placed on the principal axis at a distance
of20 cm infront of a concave mirror whose radius of curvature is 8 cm. (AS)​

Answer 1

Step-by-step explanation:

Radius of curvature = 8 cm

Focal length f = R/2 = 8/2 = 4 cm

Object distance (u) = 20 cm

Image distance (v) = ?

We know that mirror formula

1/f = 1/u + 1/v ====> 1/4 = 1/20 + 1/v

====>1/v = 1/4 - 1/20 =5-1/20 = 4/20 = 1/5

v = 1/5cm

Hope it helps you