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The wavelengths for the light of red and blue colours are nearly \(7.8\times {{10}^{-7}}\)m and \(4.8\times {{10}^{-7}}\) m respectively.(a)Which colour has the greater speed in a vacuum?(b)Which colour has the greater speed in glass?
The wavelengths for the light of red and blue colours are nearly \(7.8\times {{10}^{-7}}\)m and \(4.8\times {{10}^{-7}}\) m respectively.
(a)Which colour has the greater speed in a vacuum?
(b)Which colour has the greater speed in glass?
Class 10 | ICSE | Physics | Selina | Spectrum
The wavelengths for the light of red and blue colours are nearly \(7.8\times {{10}^{-7}}\)m and \(4.8\times {{10}^{-7}}\) m respectively.
(a)Which colour has the greater speed in a vacuum?
(b)Which colour has the greater speed in glass?

(a) In a vacuum, both colours have the same speed.

(b) In glass, the red colour has a faster speed.

i

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