Question

A prism of angle $A=1°$ has a refractive index $\mu =1.5$. A good estimate for the minimum angle of deviation is close to $N/10$. Value of $N$ is

Answer 1

Step 1: Given data

Angle, $A=1°$

Refractive index, $\mu =1.5$

Step 2: Find Value of $N$

The angle of deviation is,

$$\begin{gathered} \delta =(\mu –1)A \\ \delta =(1.5–1)A \\ \delta =0.5\times 1 \\ \delta =\frac{5}{10} \end{gathered}$$

Since, $\delta =\frac{N}{10}$

$N=5$

Hence, Value of $N$ is $5$.