A beam of monochromatic blue light of wavelength 4200 A ˚ in air travels in water of refractive index 4/3 . Its wavelength in water will be:

In water λ = 3 4 4200 = 3150 A ˚

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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsRefraction at plane surfaceMedium2 minPYQ_2009

PhysicsMediumsingle choice

A beam of monochromatic blue light of wavelength $4200 \overset{˚}{A}$ in air travels in water of refractive index $4/3$ . Its wavelength in water will be:

Options:

Answer:

Solution:

In water $λ = \frac{4200}{\frac{4}{3}} = 3150 \overset{˚}{A}$

Stream:WBJEESubject:PhysicsTopic:Geometrical OpticsSubtopic:Refraction at plane surface

⏱ 2mℹ️ Source: PYQ_2009

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