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Critical angle is the angle of incidence in denser medium , for which the angle of refraction in the rarer medium is 90°.
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The smallest angle of incidence for which light is totally reflected from a boundary between one medium and a less refractive one or
The smallest angle of incidence at which a light ray passing from one medium to another less refractive medium can be totally reflected from the boundary between the two.
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if the answer helps plz mark it as brainliest
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