In glass, light travels with a speed of 2.0 × 10^8 m/s. Light with a frequency of 3.6 × 10^14 Hz moves through the glass. What is the wavelength of the light?

Approximately in this glass.

Explanation:

The frequency of a wave is the number of periods that this wave completes per unit time.

The speed of a wave is the distance that this wave travels in unit time.

Thus, dividing the speed of the wave by the frequency of this wave would give the distance that this wave covers in each period (cycle) of this wave. By definition, the distance that a wave covers in each period is precisely the wavelength of this wave. Therefore, an equation for the wavelength of a wave would be:

.

.

Note that .

The wavelength of this light in this glass would be:

.

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