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OpenStudy (imtiaz7):
Explain the difference between laser light and light from an incandescent bulb?
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OpenStudy (festinger):
The light from a laser light has only one wavelength, whereas the light from the incandescent bulb is emitted over a whole spectrum of wavelengths. The light from laser light is also collinear, which means that it doesn't spread that much.
OpenStudy (festinger):
I also forgot to mention that laser light is coherent. Coherence is the degree of correlation between the wave and its delayed copy. It's like how in phase the 2 copies of light wave are.
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