Physics
Which colour of white light travels (a) fastest (b) slowest, in glass?
Spectrum
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Answer
(a) Red colour of white light travels fastest in glass as it has longest wavelength i.e., λ = 8000 Å.
(b) Violet colour of white light travels slowest in glass as it has shortest wavelength i.e., λ = 4000 Å.
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Related Questions
Assertion (A): A beam of white light gives a spectrum on passing through a hollow prism.
Reason (R): The speed of light outside the prism is same as the speed of light inside the prism.
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