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Question
The wavelengths for the light of red and blue colours are roughly 7.8×10−7m and 4.8×10−7m respectively. Which colour has the greater speed in vacuum?
The wavelengths for the light of red and blue colours are roughly 7.8×10−7m and 4.8×10−7m respectively. Which colour has the greater speed in vacuum?
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Solution
The correct option is C All colors have same speed
All electromagnetic waves travels at the same speed in vacuum i.e 3×108 m/s. Due to the absence of matter, there is no change in speed corresponding to wavelength. There is no absorption and re-emission of light in the absence of matter.
All electromagnetic waves travels at the same speed in vacuum i.e 3×108 m/s. Due to the absence of matter, there is no change in speed corresponding to wavelength. There is no absorption and re-emission of light in the absence of matter.
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