Laser is

May 2, 2022

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Laser is

Q. Laser is :

A. Coherent and monochromatic only

B. Intense and monochromatic only

C. Intense and coherent only

D. Intense coherent and monochromatic

Answer: Intense coherent and monochromatic

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f = r/2 is valid

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If in a plano-convex lens the radius of curvature of the convex surface is 10 cm and the focal length of the lens is 30 cm then the refractive index of the material of lens will be

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