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Fill in the blanks to complete the following sentence:

(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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1 Answers

(a) Total internal reflection occurs 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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