JEE Main 2026 · 2 Apr · Shift 1 · Physics Q40

PhysicsSingle correct+4 / -1Question 40 of 75

For a thin symmetric prism made of glass (refractive index 1.5), the ratio of incident angle and minimum deviation will be ________.

3:4

3:2

2:1

1:2

Answer and worked solution

Official answer: B

Thin prism. $\delta_m=(\mu-1)A=0.5A$ .

Minimum deviation. $i=\dfrac{A+\delta_m}2=0.75A$ .

Ratio. $i:\delta_m=0.75:0.5=3:2$ .

(B)

Topics:Prism and dispersion

JEE Main 2026 · 2 Apr · Shift 1, Physics question 40