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According to Huygens' principle,every point on a wave


A) is a diffraction source.
B) behaves as a source of new waves.
C) is the superposition of every other part of the wave.
D) all of these
E) none of these

Correct Answer

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Some double-pane airplane windows darken when the inner pane is rotated.The panes are


A) thin films.
B) Polaroid filters.
C) optical fibers.

Correct Answer

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Which of the following is a property of light waves,but not of sound waves?


A) frequency
B) wavelength
C) amplitude
D) polarization
E) none of these

Correct Answer

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Colors seen when gasoline forms a thin film on water are a demonstration of


A) refraction.
B) reflection.
C) dispersion.
D) polarization.
E) interference.

Correct Answer

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