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Refraction of Light â?– Illustrative Examples 1) A ray of light is incident on the surface of water at an angle of incidence of 70o. The ray is deviated through 25o towards the normal when it enters the water. Calculate the refractive index of water. Data :
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2) Calculate the speed of light in a medium whose critical angle is 49o.
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3) A ray of light incident at an angle of 50o on one face of an equilateral prism gets deviated through 37o, find its angle of emergence. Data :
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4) Calculate the angle of minimum deviation of a ray of light passing through an equilateral prism of refractive index 1.62. Data :
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5) The refractive indices of the material of a prism for red and violet colours are 1.72 and 1 .75 respectively. Determine the angular dispersion and dispersive power, if refracting angle of prism is 6o.
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6) For certain prism, the angle of minimum deviation is equal to the refracting angle of prism. The refractive index of the material of the prism is 1.7. Find i) the angle of minimum deviation, ii) the angle of incidence when the minimum deviation takes place. Data : 7) Wavelengths of light in water and glass are 4000
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respectively. Find
the refractive index of glass with respect to water. Data :
F.Y.J.C.
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Refraction of Light
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