The ratio of wavelengths of two electromagnetic radiations is 2: 1 then the ratios of their velocities is what
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Since light is an electromagnetic wave and it is the property of all the electromagnetic waves that they travel with same speed equal to 3×10
8
m/s in vacuum. Hence ratio of velocities of light of wavelength 4000 A
o
and 8000 A
o
in vacuum is 1:1.
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