A monochromatic beam of light has a frequency of #6.5 times 10^14# hertz. What color is the light?

1 Answer
Kaisha
May 12, 2017

Blue.

Explanation:

First we have to calculate the wavelength of the light.
#v= flambda#
#v#= velocity of light
#f#= frequency of light
#lambda#= wavelength of light

#v= flambda#
#lambda= v/"f"#
#lambda#= #(3xx10^8)/"(6.5x10^14)"#
#lambda#= #4.6xx10^-7m# or #460 nm#

Visible light lies between approx. 400 and 700 nm.
#460 nm# is seen as the colour blue in the visible light spectrum.

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