What is/are the condition(s) to achieve total internal reflection?
A
Light should travel from denser medium to rarer medium
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B
Angle of incidence should be greater than critical angle
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C
Light should travel from rarer medium to denser medium
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D
Both (a) and (b)
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Solution
The correct option is D
Both (a) and (b)
Total internal reflection is the phenomenon of light when light gets completely reflected back into the same medium. The phenomenon occurs only when ∙ Light travels from a denser medium to a rarer medium ∙ Angle of incidence is greater than the critical angle Critical angle is the angle of incidence for which the angle of refraction is 90°.