AIIMS2018Physics-Optics

AIIMS 2018 Physics Prism MCQ Question

Type: MCQ-numerical-Medium-Class 12

A thin prism of angle 1515^\circ made of glass of refractive index μ1=1.5\mu_1 = 1.5 is combined with another prism of glass of refractive index μ2=1.75\mu_2 = 1.75. The combination of the prisms produces dispersion without deviation. The angle of the second prism should be:

A

77^\circ

B

1010^\circ

C

1212^\circ

D

55^\circ

Correct Answer

Option B

Detailed Explanation

In the given equation, the condition of deviation being zero implies that the product (μ11)A1+(μ21)A2=0(\mu_1 - 1)A_1^+(\mu_2 - 1)A_2 = 0 holds true, indicating that at least one of the factors must equal zero. Since A2A_2 is calculated as 1010^\circ from the expression provided, it suggests that the angle of deviation for the second medium is effectively neutralized, aligning with the condition of zero deviation. The other options are not applicable as they do not provide relevant values or conditions related to the problem, thus not contributing to the solution.

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