What is critical angle? – InterviewSolution

InterviewSolution

1.	What is critical angle?
Answer» Solution :The angle of incidence in the denser medium for which the angle of refraction in rarei- medium is `90^(@)` When the angle of incidence in water reaches a certain critical value, the REFRACTED ray lies ALONG the boundary, having an angle of refraction of 90-degrees. This angle of incidence is known as the critical angle it is the LARGEST angle of incidence for which refraction can still occur

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