Question

Determine the focal length of the covex and concave of both of 32cm radius of curvature
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Answer 1

Answer:

Explanation: As we know that the focal length of a spherical mirror is equal to half the radius of curvature of that mirror.

According to the question the radius of curvature of a convex mirror is 32 cm.

And hence, the focal length would be :

=32÷2

=16 cm.

So, the focal length of the convex mirror is 16 cm.

Answer 2

To Find :

• Focal length of concave and convex mirror.

Answer :

Radius of curvature = 32 cm

Radius of curvature = 2 × Focal length

⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀✭ R = 2f

Focal length of concave mirror :

f = R/2

f = 32/2

f = +16

Focal length of concave mirror is positive because it's an converging mirror.

Focal length of convex mirror :

- f = R/2

- f = 32/2

- f = 16

• f = -16

Focal length of convex mirror is negative beacuse it's an diverging mirror.