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Refraction of Light

  • Thread starter SandeshPhy
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  • #1
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Why does the frequency of light wave doesn't change during refraction ?
 

Answers and Replies

  • #2
1,254
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Conservation of energy: the frequency of light is linearly related to its energy, thus if the frequency changed - so would its energy, and conservation of energy would be violated. Therefore, the frequency must stay constant.
 
  • #3
1,137
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but the speed of light charges when it goes from one medium to another ... right???
 
  • #4
1,254
3
but the speed of light charges when it goes from one medium to another ... right???
Yes, absolutely---this is required so that the wavelength can change *without* the frequency changing.

I.e.
[tex] v = \lambda \nu [/tex] (velocity = wavelength * frequency)
[tex] E = h \nu[/tex] (Energy = planck's constant * frequency = constant)
 

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