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Light from a star travels from earth in a straight line at a constant speed of 300000 kilometers per second What is the acceleration of the light?
Wiki User
∙ 14y ago
The speed of light is a constant, so the acceleration is zero.
However, light IS affected by gravity, and gravity causes an acceleration. How does this balance? The light moves at the same speed - the speed of light, abbreviated "c" - but loses or gains energy as the light moves toward or away from the gravity source.
In gaining energy (without speeding up!) the frequency of the light is increased and the wavelength of the light (or any electromagnetic energy) is decreased, In losing energy, the wavelength is increased and the wavelength decreased.
This could be a trick question, of course. Light from a star wouldn't be travelling from earth, unless we are talking about reflected light, which would not be particularly intense, but it is not out of the question.
Wiki User
∙ 14y ago
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