contestada

Which of the following cannot vary?

a)The speed of light is relative to the observer's frame of reference
b)Speed of light in a vacuum
c)The frequency of light
d)The wavelength of light

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Respuesta :

JohnLayton
The answer is B. the speed of light in a vacuum. The speed of light in a vacuum cannot vary because there are no extraneous forces to act upon the light waves inside of the vacuum.

Hope this helps!