Question

A prism of refractive index n and angle A is placed in minimum deviation position. If the angle of minimum deviation is equal to the angle A then the value of A is

Answer 1

Dear Student ,
We know that angle of minimum deviation is ,
$$\begin{gathered} \delta =\left(\mu -1\right)A \\ Nowwhen\delta =Athen, \\ A=\left(\mu -1\right)A \\ \Rightarrow \left(\mu -1\right)=0 \\ \Rightarrow \mu =1 \\ So,when\delta =Athen,A=\frac{\delta }{\left(\mu -1\right)}=\frac{\delta }{0}=\infty \end{gathered}$$

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