Question

The distence between the centre of curvature and the pole of s concave mirror is 20cm calculate the focal lenght of the mirror

Answer 1

Answer:

Explanation:

focal length = 1/2 × center of curvature.

= 1/2 × 20 cm

= 10cm

hope this helps you

Answer 2

Explanation:

Given: u=−2f f=−f (concave mirror)

To find : v

Solution: From mirror formula

v

1

+

u

1

=

f

1

v

1

−

−2f

1

=

f

−1

v

1

=

2f

−1

v=−2f