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Question
If the critical angle for total internal reflecting from medium to vacuum is 30, the velocity of light n the medium is
Options
3 × 108m/s
1.5 × 10–8m/s
6 × 108m/s
`sqrt(3)` × 108m/s
MCQ
Solution
1.5 × 10–8m/s
Explanation:
`mu = C/2 = 1/sinc = 1/(sin 30) = 1/1` = 2
V = `C/2 = (3 xx 10^8)/2` = 1.5 × 10–8 ms–1
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