该跃迁是由六光子吸收引起的。

The transition is caused by six photon absorption.

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双光子吸收限制了钕玻璃放大器的输出峰值强度。

The peak output intensity for Nd glass amplifiers is limited by two-photon absorption.

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结果表明，喇曼放大可以抵消双光子吸收的影响。

It is shown that Raman amplification can counteract the effects of two-photon absorption.

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Is there any significance at all, for example, in the number of photons that are hitting the metal or being absorbed by the metal.

举例来说，若干个光子撞击金属,或者被金属吸收究竟是否有意义。

麻省理工公开课 - 化学原理课程节选

It's called this just because it's an electron that results when an electron absorbs a photon's worth of energy, so thus it's a photoelectron.

之所以这样称呼是因为,当一个电子吸收,一个光子的能量的结果，因此它是一个光电子。

麻省理工公开课 - 化学原理课程节选

We start at this lower energy state and go up that means we need to absorb a photon, we have to take in energy.

我们从一个低能级开始，到一个高能级去,这意味着需要吸收一个光子，我们要获得能量。

麻省理工公开课 - 化学原理课程节选