Question

The Radius of curvature of a convex mirror is 5 cm . find it's Focal length ❤️❤️✌️✌️ answer plzz​

Answer 1

R = 5 cm

f = R/2

= 5/2

= 2. 5 cm

Answer 2

Answer:

2.5cm is the focal length of the convex mirror.

Explanation:

Given, radius of curvature of a convex mirror = 5cm.

• Radius of curvature of a convex mirror,convex or concave mirrors have a radius of curvature that is equal to two times their respective focal lengths.

• The radius of the sphere created by the convex or concave mirror is the radius of curvature.

Focal length;

• The distance between the optical centre and the main Focus is known as the focal length of a convex lens and is represented by the symbol f.

Relation between focal length and radius of curvature:

It has been found that the radius of curvature for spherical mirrors with small apertures is equivalent to double the focal length.

Therefore, R =  2f.

We have, R = 5cm

⇒f = $\frac{R}{2}$ = $\frac{5}{2}$ = 2.5cm

Hence, focal length of the convex mirror is 2.5cm.

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