The ratio of the refractive index of red ligh | vedclass

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(A) The refractive index of a medium depends on the wavelength of light,given by Cauchy's equation: $\mu = A + \frac{B}{\lambda^2}$.Since the waveleng

Vedclass · Accepted Answer

Less than unity

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(A) The refractive index of a medium depends on the wavelength of light,given by Cauchy's equation: $\mu = A + \frac{B}{\lambda^2}$.Since the wavelength of red light $(\lambda_{red})$ is greater than the wavelength of blue light $(\lambda_{blue})$,the refractive index for red light is less than that for blue light $(\mu_{red} Therefore,the ratio of the refractive index of red light to blue light is $\frac{\mu_{red}}{\mu_{blue}} Thus,the ratio is less than unity.

The ratio of the refractive index of red light to blue light in air is

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