JEE Main 2026 · 6 Apr · Shift 2 · Physics Q42

PhysicsSingle correct+4 / -1Question 42 of 75

Angle of minimum deviation is equal to the half of the angle of prism in an equilateral prism. The refractive index of the prism is ________.

1.5

\sqrt3

\sqrt2

1.65

Answer and worked solution

Official answer: C

Minimum deviation. $\delta_m=30^\circ$ with $A=60^\circ$ :
$\mu=\frac{\sin45^\circ}{\sin30^\circ}=\sqrt2.$

(C)

Topics:Prism and dispersion

JEE Main 2026 · 6 Apr · Shift 2, Physics question 42