Question

Find the focal length of a convex mirror whose radius of curvature is 32 cm​

Answer 1

Answer:

focal length is always half the radius of curvature

hence, the focal length is 16cm

Explanation:

Answer 2

Answer:

Object height, h

0

=6cm

Object distance, u=−30cm

Image height, h

i

=−2cm

Magnification, m=

h

0

h

i

=

u

v

⇒=

6

−2

=

−30

v

⇒v=

6

60

=10cm

Focal length:

f

1

=

v

1

−

u

1

⇒

f

1

=

10

1

+

30

1

=

300

40

f=

4

30

=7.5cm=focal length