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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsTIR/Prism and DispersionEasy2 minPYQ_2020

PhysicsEasysingle choice

A thin prism $P_{1}$ with angle $4 °$ and made from glass of refractive index $1.54$ is combined with another thin prism $P_{2}$ made from glass of refractive index $1.72$ to produce dispersion without deviation. The angle of the prism $P_{2}$ is:

Options:

Answer:

Solution:

Deviation

$d = (m - 1) A$

Given, $d_{n e t} = 0$

$∴ (m_{1} - 1) A_{1} = (m_{2} - 1) A_{2}$ or

$A_{2} = \frac{(μ_{1} - 1)}{(μ_{2} - 1)} A_{1} = \frac{(1.54 - 1)}{(1.72 - 1)} (4 °) = 3 °$

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

⏱ 2mℹ️ Source: PYQ_2020

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