JEE Main 2022 · 27 Jul · Shift 2 · Physics Q53

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PhysicsInteger+4 / -1Question 53 of 90

A thin prism of angle 6° and refractive index for yellow light $(n_Y)$ 1.5 is combined with another prism of angle 5° and $n_Y=1.55$ . The combination produces no dispersion. The net average deviation (δ) produced by the combination is $\left(\dfrac1x\right)^\circ$ . The value of $x$ is ______.

Two thin prisms P1 (angle A1 = 6°) and P2 (angle A2 = 5°) placed inverted against each other; a ray passes through both and leaves deviated by δ.

Your answer

Answer and worked solution

Official answer: 4

Net deviation with the prisms opposed: $(1.5-1)6-(1.55-1)5=3-2.75=0.25^\circ=\left(\frac14\right)^\circ$ .

Answer: 4

Topics:Prism and dispersion

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JEE Main 2022 · 27 Jul · Shift 2, Physics question 53