The width of a plane incident wave front is found to be doubled in a denser medium. If it makes an angle of 70° with the surface. Calculate the refractive index for the rarer medium. 70° WEETY A
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![The width of a plane incident wave
front is found to be doubled in a denser
medium. If it makes an angle of 70° with the
surface. Calculate the refractive index for the
rarer medium.
70°
A
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