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Total Internal Reflection

The critical ...

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The critical angle for a glass air surface, if a rayof light which is incident in air on the surface isdeviated through 15^° , when its angle of incidenceis 45^° , is

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Q. Define critical angle with reference to the total internal reflection. Calculate the critical angle for glass-air surface if a ray of light which is incident in air on the glass surface is deviated through

15^{o}

, when angle of incidence is

45^{o}

Q. (a) Calculate the critical angle for glass air interface if a ray of light incident on a glass surface is deviated through

15^{o}

when angle of incident is

45^{o}

(b) A ray of light travels from denser medium having refractive index

\sqrt{2}

to air, What should be the angle of refracted when angle of incident is

30^{0}

Q. A ray of light travelling in glass

(μ = 3 / 2)

is incident on a horizontal glass-air surface at the critical angle

θ_{C}

. If a thin layer of water

(μ = 4 / 3)

is now poured on the glass-air surface, the angle at which the ray emerges into air at the water-air surface is

Q. A ray of light travelling in glass medium

(μ_{g} = \frac{3}{2})

is incident on a horizontal glass-air interface at the critical angle

θ_{c}

. If a thin layer of water

(μ_{w} = \frac{4}{3})

is now poured on the glass-air interface , then the angle at which the ray of light emerges into water at glass-water surface will be

Q. A ray of light travelling in water is incident on its surface open to air. The angle of incidence

θ,

which is less than the critical angle. Then there will be:

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