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Question

The critical angle for light going from a medium in which wavelength is 4000A to medium in which its wavelength is 6000A is :
  1. 30
  2. 45
  3. 60
  4. sin1(23)

A
sin1(23)
B
30
C
60
D
45
Solution
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Wavelength in medium =wavelengthμ

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