What is critical angle?
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the angle of incidence beyond which rays of light passing through a denser medium to the surface of a less dense medium are no longer refracted but totally reflected
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Answer:
Critical angle
When light ray travelling in denser medium is incident on the rarer medium at an angle of incidence such that the refracted ray grazes out through the interface boundary (∠r=90) then the angle of incidence is called critical angle.
Explanation:
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