COMEDK · Physics · 25. Ray Optics
If \(A\) is the angle of prism, \(r\) angle of refraction, then the condition for minimum deviation is
- A \(A=r^{2}\)
- B \(A=2 r\)
- C \(A=\frac{r}{2}\)
- D \(A=r\)
Answer & Solution
Correct Answer
(B) \(A=2 r\)
Step-by-step Solution
Detailed explanation
For refraction through prism, \[ A=r_{1}+r_{2} \] For the case of minimum deviation, \[ \begin{aligned} & & r_{1} &=r_{2}=r \\ \therefore & & A &=r+r=2 r \end{aligned} \]
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