White light is incident on the interface of glass and air as shown in figure. If green light is just totally…
White light is incident on the interface of glass and air as shown in figure. If green light is just totally internally reflected, then reflected rays inside the glass contain
yellow, orange, red
violet, indigo, blue
green, yellow, orange
all colours except green
Solution
$\mathrm{i}_{\mathrm{c}}=\sin ^{-1}\left(\frac{1}{\mathrm{n}}\right)$ and $\mathrm{n} \propto \frac{1}{\lambda}$
Violet, indigo, blue have smaller wavelength than green, so n will be more for these rays, consequently critical angle for these rays will be low, hence if green is just totally internally reflected then red, orange and yellow rays will emerge out and violet, indigo and blue rays will be reflected inside.
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