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Q.1) Find refractive index of glass,if the speed of light in glass is 2×10⁸ and speed of light in air is 3×10⁸ m/s.

2)The far point of a myopic person is 150 cm in front of the eye.Calculate the focal length and the power of a lens required to enable him to see distant object clearly ?


Refractive index of glass n=(speed of light in air)/(speed of light in glass)
n=1.5 (refractive index of water)                        Ans.
1 5 1
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