JEE Mains · Physics · STD 12 - 9. Ray optics and optical instruments
Three rays of light, namely red (R), green (G) and blue (B) are incident on the face \(PQ\) of a right angled prism PQR as shown in figure. The refractive indices of the material of the prism for red, green and blue wavelength are \(1.27, 1.42\) and \(1.49\) respectively. The colour of the ray(s) emerging out of the face \(PR\) is:
- A green
- B red
- C blue and green
- D blue
Answer & Solution
Correct Answer
(B) red
Step-by-step Solution
Detailed explanation
Assuming that the right angled prism is an isoceles prism, so the other angles will be \(45^{\circ}\) each. \(\Rightarrow\) Each incident ray will make an angle of \(45^{\circ}\) with the normal at face \(PR\). \(\Rightarrow\) The wavelength corresponding to which the incidence…
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