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  • If the critical angle for total internal reflection from a medium to vaccum is 45o , then velocity of light in the medium is ,Option: 1 <img alt="\fr

If the critical angle for total internal reflection from a medium to vaccum is 45o , then velocity of light in the medium is ,

Option: 1

\frac{3}{\sqrt{2}}\times 10 ^{8}m/s
 


Option: 2

\sqrt{2}\times 10 ^{8}m/s


Option: 3

3\times 10 ^{8}m/s

 


Option: 4

1.5\times 10 ^{8}m/s


Answers (1)

best_answer

i_c=45^{\circ}

\mu _d^R= \frac{1}{\sin i_c}= \frac{V_{rarer}}{V_{denser}}

           \frac{1}{\sin 45^{\circ}}= \frac{3 \times 10^8}{V_{denser}}

V_{denser} = \frac{3}{\sqrt{2}}= 2.121 \times 10^8\frac{m}{s}

Posted by

HARSH KANKARIA

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