TS EAMCET · Physics · Ray Optics
The refractive index of the material of a small angled prism is 1.6 . If the angle of minimum deviation is \(4.2^{\circ}\), the angle of the prism is
- A \(4.2^{\circ}\)
- B \(7^{\circ}\)
- C \(4.8^{\circ}\)
- D \(9^{\circ}\)
Answer & Solution
Correct Answer
(B) \(7^{\circ}\)
Step-by-step Solution
Detailed explanation
\(\mu=1.6, \delta \mathrm{~m}=4.2^{\circ}\) For small angled prism, \(\delta=(\mu-1) \mathrm{A}\) \(\Rightarrow 4.2=(1.6-1) A\) \(\therefore \quad A=7^{\circ}\)
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