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Question

(A) According to Snell's Law,the degree of bending (refraction) of light depends on the refractive index of the medium for that specific wavelength.Li

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Colour $A$

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(A) According to Snell's Law,the degree of bending (refraction) of light depends on the refractive index of the medium for that specific wavelength.Light that bends more has a higher refractive index for that medium,which implies a lower velocity of light in that medium.Since colour $A$ is bent more than colour $B$,the refractive index for colour $A$ is higher than that for colour $B$ in the second medium.Because the speed of light $v$ is inversely proportional to the refractive index $n$ $(v = c/n)$,a higher refractive index results in a lower speed.Therefore,colour $A$ travels more slowly in the second medium.

When light of two colours $A$ and $B$ is passed through a plane boundary; $A$ is bent more than $B$. Which colour travels more slowly in the second medium?

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