Fill in the blank spaces by choosing the correct words from the list given below: List : Refractive index, refracted, normally, deviates, less 1. The phenomenon due to which a ray of light from its path while travelling from one optical medium to another optical medium is called refraction. 2. The incident ray, the the normal lie in the same plane during refraction. 3. When a ray of light strikes the surface of separation of two optical media it does not suffer any refraction. 4. The ratio of velocity of light in vacuum to the velocity of light in a given media is called ray and
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