Which colour has the maximum speed in glass?

Violet

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Red

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Yellow

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Green

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Solution

The correct option is B Red
In the vacuum, the light of different colours travels with the same speed. But in mediums like water, light travel with different speeds. In a glass, the red light travels the fastest and the violet light travels the slowest of all the seven colours. Speed and wavelength are directly proportional. When wavelength increases, speed also increases. Hence light with maximum wavelength travels with maximum speed.

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Similar questions

Which colour light has the maximum wavelength?

The wavelengths for the light of red and blue colors are nearly $7.8 \times 10^{- 7} m$ and $4.8 \times 10^{- 7} m$ respectively.

(a) Which color has the greater speed in a vacuum?

(b) Which color has the greater speed in glass?

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