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Refraction of Light

43. The refra...

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43. The refractive index of the material of the prismof an angle 60 degree is 1.62 for sodium light. The angle of minimum deviation for this light is: Why cannot we use the formula: deviation= (refractive index - 1) angle of prism??

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A prism is made of glass of unknown refractive index. A parallel beam of light is incident on a face of the prism. The angle of minimum deviation is measured to be 40°. What is the refractive index of the material of the prism? The refracting angle of the prism is 60°. If the prism is placed in water (refractive index 1.33), predict the new angle of minimum deviation of a parallel beam of light.

Q. The angle of incidence for a ray of light at a refracting surface of a prism is

45^{o}

. The angle of prism is

60^{o}

. 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

Q. A glass prism with a refracting angle of

60^{\circ}

has a refractive index

1.52

for red light. A parallel beam of white light is incident on one face of the prism at an angle of incidence, which gives minimum deviation for red light. Find the angle of minimum deviation for red light.
[Given:

sin (50^{\circ}) = 0.760

]

Q. An equilateral prism is made of a material of refractive index

\sqrt{3}

.The angle of minimum deviation for the prism is

Q. A prism with an angle A=60° produces an angle of minimum deviation 30°.Then the refractive index of the material of prism

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