Total internal reflection occurs when a ray of light passes from a medium to a ____ medium.

rarer, rarer

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denser, denser

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rarer, denser

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denser, rarer

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Solution

The correct option is C denser, rarer
Total internal reflection is the property where a ray of light travelling from denser to rarer medium at an angle greater than the critical angle. This is not possible for light travelling from rarer to denser medium since the angle of refraction for such a light ray can never be $90^{o}$ as refractive index of rarer medium is lesser than that of denser medium.

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Total internal reflection occurs when a ray of light passes from a ________ medium to a ____________ medium.

Total internal reflection occurs when a ray of light passes from a medium to a ____ medium.