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1. The path of the light is called as.
2. The refractive index of a transparent medium is always greater than .
3. If the energy of incident beam and the scattered beam are same, then the scattering of light is called as scattering.
4. According to Rayleigh’s scattering law, the amount of scattering of light is inversely proportional to the fourth power of its.
5. Amount of light entering into the eye is controlled by.
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