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A light ray enters a glass slab at exactly 90⁰. Its angle of refraction is |
Answer» <html><body><p>When the angle of incidence in water reaches a <a href="https://interviewquestions.tuteehub.com/tag/certain-407894" style="font-weight:bold;" target="_blank" title="Click to know more about CERTAIN">CERTAIN</a> <a href="https://interviewquestions.tuteehub.com/tag/critical-427694" style="font-weight:bold;" target="_blank" title="Click to know more about CRITICAL">CRITICAL</a> value, the <a href="https://interviewquestions.tuteehub.com/tag/refracted-7709131" style="font-weight:bold;" target="_blank" title="Click to know more about REFRACTED">REFRACTED</a> ray lies along the <a href="https://interviewquestions.tuteehub.com/tag/boundary-401242" style="font-weight:bold;" target="_blank" title="Click to know more about BOUNDARY">BOUNDARY</a>, having an angle of refraction of 90-degrees. This angle of incidence is <a href="https://interviewquestions.tuteehub.com/tag/known-534098" style="font-weight:bold;" target="_blank" title="Click to know more about KNOWN">KNOWN</a> as the critical angle; it is the largest angle of incidence for which refraction can still occur.angle of refraction is zero.Explanation:</p></body></html> | |