The speed of light in air is 3108 ms if a certain led emits
The speed of light in air is 3*10^8 (m/s). If a certain led emits red light of wavelength 650nm, how fast would it have to be moving in order for the light to appear yellow that is 600nm? Would it need to move toward or away from the observer?
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the speed of light in air is 3108 ms if a certain led emits red light of wavelength 650nm how fast would it have to be
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