Total internal reflection occurs when

i=0

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i>ic

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i=ic

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Solution

The correct option is C i>ic
When a light travelling in a denser medium, is incident at the surface of a rarer medium such that the angle of incidence is greater than the critical angle for the pair of medium, the ray is totally reflected back into the denser medium. This phenomenon is called the total internal reflection.

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Total internal reflection occurs when:

State the condition at which total internal reflection occurs.

(a) What is total internal reflection?

(b) State two conditions necessary for the total internal reflection to occur.

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