Physics
A lens which converges a beam of parallel rays to a point is called______________?
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A photon is________________?
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A photon of wavelength 900nm behaves like a particle of mass______________?
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A point where parallel rays converge or appear to diverge is called______________?
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A three-dimensional image is obtained by________________?
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A train moves at 100 mph. Its speed in m/s is?
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A___________has no size or shape?
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Acceleration of moon compared to earth?
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Acceptor and donor impurities donate______________?
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