A prism of angle A=1° has a refractive
Question:

A prism of angle $\mathrm{A}=1^{\circ}$ has a refractive index $\mu=1.5$. A good estimate for the minimum angle of deviation (in degrees) is close to N/ 10. Value of $\mathrm{N}$ is___________.

Solution:

$\delta_{\min }=(\mu-1) \mathrm{A}$

$=(1.5-1) 1$

$=0.5$

$\delta_{\min }=\frac{5}{10}$

$\mathrm{N}=5$