A plot between the angle of deviation and angle of incidence is shown in figure. From the graph one can say that the prism angle is

Question

A plot between the angle of deviation and angle of incidence is shown in figure. From the graph one can say that the prism angle is (A) 47° (B) 46° (C) 45° (D) 60°

Tardigrade Admin · Accepted Answer

i+e=A+δ 38° and 58° can be i or e in the equation as δ will be same for both values of incidence ray. 38°+58°=A+50° ∴ A=46°

Q. A plot between the angle of deviation and angle of incidence is shown in figure. From the graph one can say that the prism angle is

$4 7^{\circ}$

$4 6^{\circ}$

$4 5^{\circ}$

$6 0^{\circ}$

$i + e = A + δ$
$3 8^{\circ}$ and $5 8^{\circ}$ can be $i$ or $e$ in the equation as $δ$ will be same for both values of incidence ray.
$3 8^{\circ} + 5 8^{\circ} = A + 5 0^{\circ}$
$∴ A = 4 6^{\circ}$