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The laser in a compact disc (cd) player uses light with a wavelength of 715 nm. what is the frequency of this light?
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The laser in a compact disc (cd) player uses light with a wavelength of 715 nm. what is the frequency of this light?

User Cclerv
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1 Answer

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In order to get the frequency of this light you have to divide the speed of light by the wavelength.
The formula:
F = c / w
Set the values in the appropriate form:
740nm = 7.40e-9m


Solution:

3.00e8m/s : 7.40e-9m F = 6.38e16Hz
The answer: = 63.8PHz
User Hockeybro
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