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When light is incident on a medium at an...

When light is incident on a medium at angle i and refracted into a second medium at an angle r, the graph of `sin r` versus `sin i` is as shown. From this one can conclude that

(i) the velocity of light in second medium is `sqrt3` times the velocity of light in the first medium
(ii) the velocity of light in the first medium is `sqrt3` times the velocity of ligth in second medium
(iii) the critical angle of the two media is given by `sin i_C=1sqrt3`
(iv) the critical anlge of the two media is given by `sin i_C=1sqrt2`

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The correct Answer is:
B, C
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