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Light with a frequency of 5.70×10^14 Hz travels in a block of glass that has an index of refraction of 1.56. What is the wavelength of the light in the glass?

Respuesta :

Kei2005

Answer:

QUESTION①)

✔First you have to calculate the light's speed in the glass,

You know that in the air and in the void (where the refraction index n is zero) the light's speed C corresponds to 3,0 x 10^8 m/s

So We have :

V = C/n

  • V = 3,0 x 10^8/1,56
  • V  ≈ 1,92 x 10^8  m/s

✔ Now, you know the light's speed in glass, and you know that : the wavelength λ is the quotient of light's speed V on its frequency ν, so :

λ = V/ ν

  • λ = 1,82 x 10^8/5,70 x 10^14
  • λ ≈ 3.40 x 10^-7 m
  • λ ≈ 340 nm

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