MHT CET · Physics · Ray Optics
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
- A yellow, orange, red
- B violet, indigo, blue
- C green, yellow, orange
- D all colours except green
Answer & Solution
Correct Answer
(B) violet, indigo, blue
Step-by-step Solution
Detailed explanation
\(\mathrm{i}_{\mathrm{c}}=\sin ^{-1}\left(\frac{1}{\mathrm{n}}\right)\) 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.
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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