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Total Internal Reflection

Fill in the b...

Question

Fill in the blanks to complete the following sentences :

(a) Total internal reflection occurs only when a ray of light passes from a .............................medium to a ..........................medium.

(b) Critical angle is the angle of ................in denser medium for which the angle of ..............in rarer medium is .................

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Solution

a) Total internal reflection occurs only when a ray of light passes from a DENSER..medium to a ..RARER..medium.

(b) Critical angle is the angle of .INCIDENCE.in denser medium for which the angle of ..REFRACTION...in rarer medium is ....90

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Total internal reflection of a ray of light is possible when the ( $i_{c}$ = critical angle, $i$ = angle of incidence)

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D. Critical angle must be greater than the angle of incidence.

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Q. Total internal reflection can happen only when light ray passes from denser to rarer medium.

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