Physics
A beam consisting of red, blue and yellow colours is incident normally on the face AB of an isosceles right-angled prism ABC as shown in the figure given below. Critical angle of glass-air interface for yellow colour is 45°.
Out of the four emergent rays P, Q, R and S, which one is for the yellow colour :
- P
- Q
- R
- S
Spectrum
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Answer
Q
Reason — As the critical angle for yellow colour is 45°, so it suffers refraction along the line AC of the prism.
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