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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsTIR/Prism and DispersionMedium2 minPYQ_2023

PhysicsMediumsingle choice

A thin prism $P_{1}$ with an angle $6 °$ and made of glass of refractive index $1.54$ is combined with another prism $P_{2}$ made from glass of refractive index $1.72$ to produce dispersion without average deviation. The angle of prism $P_{2}$ is :

Options:

Answer:

Solution:

For no average deviation,

$δ_{1} + δ_{2} = 0 \Rightarrow A (μ_{1} - 1) - B (μ_{2} - 1) = 0$

$\Rightarrow 6 ° (1.54 - 1) = θ (1.72 - 1)$

$\Rightarrow θ = \frac{6 ° \times 0.54}{0.72}$

$= 4.5 °$

Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:TIR/Prism and Dispersion

⏱ 2mℹ️ Source: PYQ_2023

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