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Light Reflection and Refraction
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02/12/2020 12:32 pm
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A ray of light enters a rectangular glass slab of refractive index 1.5. It is found that the ray emerges from the opposite face of the slab without being displaced. If its speed in air is 3 x 108 ms-1 then what is its speed in glass?
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02/12/2020 12:34 pm
Since, n = c/v
we get, v = c/n = 3 x 108/1.5
= 2 x 108 m/s