Question

White light is incident on the interface of glass and air as shown in the figure. If green light is just totally internally reflected then the emerging ray in air contains

• A. Yellow, orange, red
• B. Violet, indigo, blue
• C. All colours
• D. All colours except green

Answer 1

The correct option is A Yellow, orange, red

$C=si{n}^{-1}\left(\frac{1}{\mu }\right)$ and $\mu \propto \frac{1}{\lambda }$

Yellow, orange and red have wavelength than green, So $\mu$ will be less for these
rays, consequently critical angle for these rays will be high, hence if green is just totally
internally reflected then yellow, orange and red rays will emerge out.