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प्रश्न
What do you understand by the statement that refractive index of ordinary glass is 1.5?
लघु उत्तरीय
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उत्तर
A refractive index of 1.5 for ordinary glass means that light travels 1.5 times faster in vacuum than in glass.
Thus, V = `c/1.5`; using c = 3 × 108 m/s, the speed of light in ordinary glass is approximately 2.0 × 108 m/s.
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