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31. The planes of vibrations of the extraordinary and the ordinary rays are
A. parallel to each other
B. perpendicular to each other
C. making an angle of 57.5° with the axis
D. making an angle of 32.5° with the axis
Explanation:
32. Nicol prism is used to produce
A. diffraction of light
B. polarized light
C. spectrum
D. refraction of light
Explanation:
33. Polaroid are used in aero planes to
A. reduce pressure
B. increase incoming radiations
C. reduce incoming radiations
D. increase pressure
Explanation:
34. The light which cannot be completely plane polarized by reflection is
A. red color
B. green color
C. white color
D. blue color
Explanation:
35. In Nicol prism, the refractive indices for the ordinary ray and the extraordinary ray are
A. 1.49 and 1.66 respectively
B. 1.66 and 1.49 respectively
C. 1.55 and 1.66 respectively
D. 1.55 for both
Explanation:
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