Question

A beam of white light is incident on glass air interface from glass to air such that green light just suffers total internal reflection. The colors of the light which will come out to air are:

• A. Violet, Indigo, Blue
• B. All colors except green
• C. Yellow, Orange, Red
• D. White light

Answer 1

The correct option is C Yellow, Orange, Red

$\upsilon =f\lambda {\lambda }_R>{\lambda }_G>{\lambda }_{Blue}{V}_R>V_G>V_{Blue}$

From eq $\mu =\frac{c}{\upsilon }$

we conclude that $\mu \propto \frac{1}{\upsilon }$

${\mu }_R<{\mu }_G<{\mu }_{Blue}$

From eq $ic={\sin }^{-1}\frac{1}{\mu }$

${ic}_{red}>{ic}_{green}>{ic}_{blue}$

If green reflects then all colours from green to red will reflect .

yellow,Orange,Red