Question

pls help................​

Answer 1

Answer:

14 cm

Explanation:

We know that any parallel beam of light to principal axis meets at focus after being reflected by the spherical mirror.Hence the reflected beam strikes at focus of spherical mirror which is 7 cm away from its pole.

According to the relation---

Radius of curvature, r=2*Focus

r = 2*7

r = 14 cm

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Answer 2

Answer:

C = 14 cm

Explanation:

The point at where the parallel beams of light after reflection meet the surface is known as principal focus .

so, according to the question principal focus is equal to 7cm.

f = 7cm

We know that f = C/2

7 = C/2

C = 7(2)

C = 14cm