A beam of light of wavelength 400 nm is incident normally on a right angled prism as shown in fir.2.45.
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It is observed that the light just grazes long the surface AC after falling on it.Give that there fractive index of the material of the prism varies with the wavelength as per the relation.
`mu=1.2 + b/(gamma^2)`
Calculate the value of b and the refractive index of the prism material for a wavelength `gamma = 500 nm`.Given `theta=sin^(-1) 0.625`.