Physics, asked by Lagoona, 11 months ago

what is the focal length is R = 40?

Answers

Answered by prakharverma2209

2

Answer:

20 units

Explanation:

F = R/2

F = 40/2

F = 20

The focal length is 20 units long

Answered by piyushraj77

0

Answer:

It always be in convex lens.

hope it will helps u

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