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Light from a denser medium I goes to a r...

Light from a denser medium I goes to a rarer medium II.When angle of incidence is `theta`,the reflected and refraced ray s are perpenciculat to each other .The crtitical angle is:

A

`sin^(-1) (cos theta)`

B

`sin^(-1)(cot theta)`

C

`sin^(-1)(tan theta)`

D

`sin^(-1)(1)`.

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
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