JEE Mains · Physics · STD 12 - Ray optics and optical instruments
- JEE Mains 2018
- Hard
- Numerical
A ray of light is incident at an angle of \(60^o\) on one face of a prism of angle \(30^o\) . The emergent ray of light makes an angle of \(30^o\) with incident ray. The angle made by the emergent ray with second face of prism will be....\(^o\)
Pick an option to check your answer.
Answer & Solution
Correct Answer
(C) \(90\)
Step-by-step Solution
Detailed explanation
Augle of prism, \(A=30^o,\,\, i=60^o,\)
angle of deviation, \(\delta=30^o\)
Using formula, \(\delta=i+e-A\)
\(\Rightarrow e=\delta+A-i\)
\(=30^o+30^o-60^o=0^o\)
Emergent ray will be perpendicular to the face
So it will make angle \(90^o\) with the force through which it emerges.
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