In a prism of angle A, the condition for no emergence of light is :–
(a) μ>cosec(A/2)
(b) μ> sin(A/2)
(c) μ>cos(A/2)
(d) μ>cos A
(μ = refractive index of material of prism)
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A ray of light incident at an angle θ on a refracting face of a prism emerges from the other face normally.
the angle of incidence is 2.5°.
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What do you understand by the deviation produced by a prism? Why is it caused? State three factors on which the angle of deviation depends.
In a prism the ray of light suffers refraction at two faces. The prism produces a deviation at the first surface and another deviation at the second surface. Thus a...
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Write a relation for the angle of deviation (δ) for a ray of light passing through an equilateral prism
The relation between the angle of incident (i), angle of emergence (e), angle of prism (A) and angle of deviation (δ) for a ray of light passing through an equilateral...
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A ray of light incident at an angle of incidence i1 passes through an equilateral glass prism such that
(i) i2 = i1 (ii) Angle of deviation is minimum Explanation: In minimum deviation position, the refracted ray inside the prism travels parallel to it if the prism is equilateral and the...
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How does the angle of deviation depend on the refracting angle of the prism?
The angle of deviation (δ) increases with the increase in the angle of prism (A).
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In refraction of light through a prism, the light ray: (a) Suffers refraction only
The light ray bends at both the surfaces of prism towards its base.
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A ray of light suffers refraction through an equilateral prism. The deviation produced by the prism does not depend on the:
The deviation produced by the prism does not depend on the size of prism.
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A ray of light incident at an angle 48° on a prism of refracting angle 60° suffers minimum deviation.
Given, Angle of incidence, i = 48° Refracting angle, A = 60° Angle of minimum deviation, δmin =? As δmin = 2i – A δmin = 2(48) – 60 δmin = 36°
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Mention one difference between reflection of light from a plane mirror and total internal reflection of light from a prism.
When total internal reflection occurs from a prism, the entire incident light (100%) is reflected back into the denser medium. Whereas in ordinary reflection from a plane mirror, some light...
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In the spectrum of white light by a prism, the colour at the extreme end opposite to the base of prism is:
The colour of the extreme end opposite to the base of the prism is red. Hint: The angle of deviation decreases with the increase in wavelength of light for a given...
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