Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsDispersionEasy2 minPYQ_2020

PhysicsEasysingle choice

A beam of light consisting of red, green and blue colours is incident on a right-angled prism. The refractive index of the material of the prism for the above red, green and blue wavelengths are $1.39$ , $1.44$ and $1.47$ respectively.

The prism will:

Options:

Answer:

Solution:

For TIR $I > I_{c}$
so, $S i n i > \sin I_{c}$

$S i n 45^{o} > \frac{1}{μ} \Rightarrow μ \sqrt{2} \Rightarrow μ = 1.414$

Since $μ$ of green and violet are greater than 1.414 so they will total internal refrected. But red colour will be vetracted.

Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:Dispersion

⏱ 2mℹ️ Source: PYQ_2020

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