In question B, it shows that wavelength is effected by different refractive inde

Question

In question B, it shows that wavelength is effected by different refractive indecies. In question C, it shows that frequency is effected by the wavelength. My question is why in question C does it state that the frequency in quartz is the same as in vacuum, if the wavelength in quartz is not the same as in vacuum. Shouldn't we use the value we calculated in part B as our wavelength in C?

(B) What is the wavelength of this light in fused quartz? Use the relevant equation to calculate the wavelength: A0 589 nm 1.458 C) What is the frequency of the light in fused quartz The frequency in quartz is the same as in vacuum. Solve c = for the frequency c 3.00 x 108 m/s A 5.8 5.89 x 10-7 m5.09 x 1014 Hz

Explanation / Answer

Frequency is the ratio of speed of light in medium to the wavelength of light in the medium. Since speed of light and wavelength of the light are inversly preportional to the refractive index of the meduium, their ratio is independent of the refractive index of the medium and hence it possess same value as it in vaccum

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