why the speed of light change on passing through a transparent medium?
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Answer:
due to phenomenon of refraction.
Explanation:
Refraction is a phenomenon in which the light ray bends due to change in medium.
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When light traveling in a vacuum enters a new transparent medium, such as air, water, or glass, the speed is reduced in proportion to the refractive index of the new material. ... As the slider is translated to the right, the refractive index increases and the speed of light subsequently decreases.
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