Electromagnetic Waves - Questions & Answers | Exam2Win

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16. For one incident ray there will be generally two refracted rays in double refraction in calcite crystals. Which of the following statement is correct?

A. Out of two refracted rays one is polarized and the other is not

B. Both are polarize in the same plane of polarization

C. Both are polarized, but their planes of polarization are at right angles to each other

D. Neither is polarized

Explanation:

17. The polarizing angle for glass is about

A. 36.0°

B. 42.0°

C. 57.5°

D. 90.0°

Explanation:

18. If the polarizing angle for glass plate is 60°, then the refractive index of the glass plate is 0.5

A. 0.5

B. √3/2

C. √3

D. 1/√2

Explanation:

19. The velocity of the extraordinary ray and that of the ordinary ray in calcite crystal are

A. same in all directions

B. different in all directions

C. same in only one direction namely along the optic axis

D. zero in one direction and more than zero in perpendicular direction

Explanation:

20. When light is incident on a plane surface at the polarizing angle, the angle between the reflected beam and the refracted beam

A. 45°

B. 90°

C. 57.5°

D. 32.5°

Explanation:

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