Question

find the distance of the image when object is placed on principle axis at a distance of 15 cm in front of a concave mirror whose radius is 20 cm ​

Answer 1

Answer:

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