Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsTIR/Prism and DispersionEasy2 minPYQ_2020

PhysicsEasysingle choice

A ray of light is incident normally on one of the faces of a prism of apex angle $30 °$ and refractive index $\sqrt{2} .$ The angle of deviation of the ray is

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Answer:

Solution:

Using Snell’s law for the refraction at AC, we get

$μ sini = (1) sinr$

$\sqrt{2} \sin 30 ° = sinr$

$sinr = \frac{1}{\sqrt{2}}$

$\Rightarrow r = 45 °$

$∴$ Angle of deviation $= 45 ° - 30 ° = 15 ° .$

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

⏱ 2mℹ️ Source: PYQ_2020

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