Physics, asked by uanjaiah, 10 months ago

what is the focal length of double concave lens kept in air with two spherical surfaces of radii R1 equals to 30 cm and R2 = 60 CM take effect 2 index of lens as in equal to 1.5

Answers

Answered by Haribhaskaran

1

Answer:

I don't know

Explanation:

it is because, I didn't understand on calculating double convex

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