The cells emitted light once every 24 hours over a sustained period of time.

在一段持续的时间内，这些细胞每隔24个小时就发光一次。

youdao

Thus, back emitted light is reflected by the dichroic filter 106 towards wavelength converting element 110.

因此，反向发射的光被二向色滤光片106朝向波长转换元件110反射。

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In the embodiment shown in FIG. 4a, only a portion of the emitted light is collected by the optical concentrator 108.

在图4a所示的实施例中，发射光的仅一部分被光学集中器108收集。

youdao

So that means we're going to need to figure out what is the energy per photon that's emitted by that UV light.

所以那意味着我们将需要,计算出从紫外光源发射出的,每个光子的能量。

麻省理工公开课 - 化学原理课程节选

And what we predict as an energy difference between two levels, we know should correspond to the energy of light that's either emitted, if we're giving off a photon, or that's absorbed if we're going to take on a photon and jump from a lower to a higher energy level.

我们预测，两个能级之间的能量差，我们知道，它要么和发出的光有关,如果它发出光子的话，要么它吸收光子,从低能级跃迁到，更高能级上去。

麻省理工公开课 - 化学原理课程节选

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