Question

focal length of a convex mirror is 12.5 cm. how far it is centre of curvature(a) from the pole(b) from the focus

Answer 1

a-12.5+12.5=25cm
b-12.5cm

Answer 2

Answer:

Focal length of a mirror is half of the radius of the mirror (in both concave and convex mirror).

Explanation:

Focal length is defined as the distance between the center of a concave mirror or convex mirror and the focal point (point at which parallel rays intersect) of the  mirror.

Here,

focal length (f) of a convex mirror = 12.5 cm

a) Distance between Center of curvature from the pole (Radius of curvature or R) is twice of the focal length:

R = 2 x f

R = 2 x 12.5

R = 25 cm

b) Distance between Center of curvature from the focus is equal to the focal length.

R = 12.5

Hence, the  center of curvature from the pole is  25 cm far and from the focus is 12.5 cm far.

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