本题目来源于试卷: Quantum Mechanics of Atoms，类别为 IB物理学
[问答题]
How does laser light differ from ordinary light? How is it th i61nacqa+d1c e sah : cpw9b8jl7zme?
参考答案:
Different: Laser light is coherent (all of the photons are in the same phase) and ordinary light is not coherent (all of the photons have random phases). Laser light is nearly a perfect plane wave, while ordinary light is spherically symmetric (which means that the intensity of laser light remains nearly constant as it moves away from the source, while the intensity of ordinary light drops off as 1/$r^2$). Laser light is always monochromatic, while ordinary light can be monochromatic, but it usually is not. Similar: Both travel at c and both display wave-particle duality of photons.
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