Determine the speed, wavelength, and frequency of light from a helium-neon laser as it travels through zircon. the wavelength of the light from the laser is 632.8 nm in air and the index of refraction of zircon is 1.923.

(a) Speed

the speed of the helium-neon light in zircon is given by

where

is the speed of light in vacuum (and in air)

is the refractive index of zircon

Substituting into the equation, we find

(b) Frequency

The wavelength of the light in air is:

The frequency of the light does not depend on the medium, so it is equal in air and in zircon. Therefore, we can calculate the frequency by using the speed of light in air and the wavelength in air:

and the frequency of the light in zircon is the same:

(c) Wavelength

To calculate the wavelength of the light in zircon, we can use the relationship between speed of light in zircon and frequency:

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answerscientific theory;