Question

the radius of curvature of a spherical mirror is 20 cm. what is its focal length?​

Answer 1

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Explanation:

Radius of curvature = 2 x focal length.

So, focal length =  

2

1

​

× radius of curvature =  

2

1

​

×20 cm = 10 cm

Answer 2

Answer:

focal length of spherical mirror =C/2

therefore focal length = 10 cm