why light cannot travel rarer medium to denser medium
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Explanation:
When light travels from a rarer to denser medium it bends towards the normal, the condition for total internal reflection requires the ray to bend away from the normal till 90 degree angle is attained. ... Hence it will not be a case of rarer to denser medium refraction.
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Answer:
Refraction of light when it goes from a rarer medium to a denser medium: ... Thus, when a ray of light goes from air to glass, it bends towards the normal (at the point of incidence). In this case, the angle of refraction (r) is smaller than the angle of incidence (i).
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