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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 i vs sin r is as shown in the graph, From this, one can conclude that

A

velocity of light in the second medium is 1.73 times the velocity of light in the I medium.

B

velocity of light in the I medium is 1.73 times the velocity in the II medium.

C

the critical angle for the two media is given by `45^@`

D

`sin i_C = frac(1)(2)`

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