Compare the speeds of light of wavelength 4000Å (violet light) and 8000Å (red light) in vacuum.
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Compare the speeds of light of wavelength 4000Å (violet light) and 8000Å (red light) in vacuum.
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Light is electromagnetic wave and its property of all electromagnetic wave that they are travel with same speed is equal to 3×10 to the power of 8m/s in vaccum.
Hence the ratio if velocity of wavelength of light 4000oA and 80000A is 1:1.
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