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A light ray through a glass prism of angle 60° under goes a minimum deviation of 30°. What is the speed of light in the prism?
(Assume c= speed of light in air)

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Important Questions on Ray Optics

MEDIUM
Physics>Optics>Ray Optics>Dispersion of Light
Which is the following colourful patterns is due to diffraction of light?
EASY
Physics>Optics>Ray Optics>Dispersion of Light
Which of the following colour suffers maximum deviation in a prism?
EASY
Physics>Optics>Ray Optics>Dispersion of Light
The separation of a beam of light into its constituent wavelengths is called
HARD
Physics>Optics>Ray Optics>Dispersion of Light
Monochromatic light is incident on a glass prism of angle A. If the refractive index of the material of the prism is μ , a ray, incident at an angle θ , on the face AB would get transmitted through the face AC of the prism provided:

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EASY
Physics>Optics>Ray Optics>Dispersion of Light
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EASY
Physics>Optics>Ray Optics>Dispersion of Light
If the refracting angle of a prism is 60° and minimum deviation is 30°, then the angle of incidence will be
EASY
Physics>Optics>Ray Optics>Dispersion of Light

In the given figure, what is the angle of prism?

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MEDIUM
Physics>Optics>Ray Optics>Dispersion of Light
What is the required condition, if the light incident on one face of a prism, does not emerge from the other face?
MEDIUM
Physics>Optics>Ray Optics>Dispersion of Light
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EASY
Physics>Optics>Ray Optics>Dispersion of Light
In which colour have maximum dispersion
EASY
Physics>Optics>Ray Optics>Dispersion of Light
The angle of incidence for a ray of light at a refracting surface of a prism is 45o. The angle of prism is 60o. If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are:
MEDIUM
Physics>Optics>Ray Optics>Dispersion of Light
The angle of a prism is 60o . When light is incident at an angle of 60o on the prism, the angle of emergence is 40o . The angle of incidence i for which the light ray will deviate the least is such that
EASY
Physics>Optics>Ray Optics>Dispersion of Light
A parallel beam of light is incident from air at an angle α on the side PQ of a right angled triangular prism of refractive index n=2 . Light undergoes total internal reflection in the prism at the face PR when α has a minimum value of 45o. The angle θ of the prism is:

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EASY
Physics>Optics>Ray Optics>Dispersion of Light
Dispersion without deviation is produced by two thin (small angled) prisms which are combined together. One prism has angle 5° and refractive index 1.56. If the other prism has refractive index 1.7, what is its angle?
EASY
Physics>Optics>Ray Optics>Dispersion of Light
The graph between angle of deviation δ and angle of incidence i for a triangular prism is represented by :
EASY
Physics>Optics>Ray Optics>Dispersion of Light
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EASY
Physics>Optics>Ray Optics>Dispersion of Light
The refracting angle of a prism is A , and refractive index of the material of the prism is cotA2. The angle of minimum deviation is
EASY
Physics>Optics>Ray Optics>Dispersion of Light
A thin prism P1 with angle 4° and made from glass of refractive index 1.54 is combined with another thin prism P2 made from glass of refractive index 1.72 to produce dispersion without deviation. The angle of prism for P2 is
EASY
Physics>Optics>Ray Optics>Dispersion of Light
A thin prism having refracting angle 10o is made of glass of refractive index 1.42. This prism is combined with another thin prism made of glass of refractive index 1.7. This combination produces dispersion without deviation. The refracting angle of second prism should be
MEDIUM
Physics>Optics>Ray Optics>Dispersion of Light
It was found that the refractive index of material of a certain prism varied as 1.5+0.004λ2, where λ is the wavelength of light used to measure the refractive index. The same material was then used to construct a thin prism of apex angle 10°. Angles of minimum deviation δm of the prism were recorded for the sources with wavelengths λ1 and λ2 respectively. Then