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(i) It has of continuously varying wavelengths in a exact wavelength range.
(ii) It is given by solids, liquids and highly compressed gases heated to high temperature.
(iii) E.g. Light from the sun, candle flame, filament of incandescent bulb etc.
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Noise: An undesirable and unpleasant sound that makes harmful effects on our auditory system is known as noise.
constraint motion
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