Question

1. Find the distance of the image when an object is placed on the principal axis at a distance
of 10 cm infront of a concave mirror whose radius of curvature is 8 cm. ​

Answer 1

Explanation:

Given : u=−10cm R=−8cm=2f f=−4cm

To find : v

Solution: From mirror formula

v

1

+

u

1

=

f

1

v

1

−

10

1

=−

4

1

v

1

=

10/4

−6

v=

3

−20

cm

Answer 2

Given : u=−10cm R = −8cm = 2f f = −4cm

To find : v

Solution: From mirror formula

1/v+ 1/u = 1/f

1/v − 1/10 = − 1/4

1/v = −6/10/4

v = − 20/3cm