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Electromagnetic Waves - Questions and Answers

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36. In a doubly refracting crystal, along the optic axis, the ordinary ray and the extraordinary ray
A. travel with the same velocity
B. have different velocities
C. travel slowly
D. travel faster
Explanation:
37. In Nicol prism, the phenomenon that takes place at the layer of Canada balsam is
A. reflection only
B. total internal reflection for ordinary and refraction for extraordinary rays
C. total internal reflection for extraordinary and refraction for ordinary rays
D. refraction only
Explanation:
38. The production of stereoscopic motion picture uses the principle of
A. interference
B. diffraction
C. polarization
D. reflection
Explanation:
39. A device using micro crystal of herapathite (iodosulphate of quinine) is used for the production of
A. diffraction
B. X-rays
C. interference pattern
D. polarization of light
Explanation:
40. H- Polaroid is a thin film of
A. herpatite impregnated with nitrocellulose
B. quinine iodosulphate impregnated with iodine
C. polyvinyl chloride
D. polyvinyl alhohol
Explanation:
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