ChemiLuntinescence (CL) is the emission of light after excitation of a fluorescent molecule by a chemical reaction.

荧光物质分子被化学反应激发后发出的光被称为化学发光。

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Based on this result, a mechanism for the emission of light and other electromagnetic radiations observed during rock fracture is suggested.

根据这一结果提出了岩石破裂中出现可见光及其它电磁辐射的理论解释。

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Hence the spectrum is called a line spectrum; it is also called an atomic emission spectrum since it is produced by emission of light from excited atoms.

因此，这个光谱也被称为线光谱，也被称为原子发射光谱，因为它是由被激活的原子发出的光产生的。

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Absorption is just the opposite of emission, so instead of starting at a high energy level and dropping down, when we absorb light we start low and we absorb energy to bring ourselves up to an n final that's higher.

吸收就是发射的逆过程,与从一个高能量到低能量不同，当吸收光时，我们从低能量开始,吸收能量到一个更高的能量。

麻省理工公开课 - 化学原理课程节选

The white of his expansive tabletops in paintings like "The Table" and "The White Table Cloth" resembles an emission of light rather than a pigment, so the haphazardly strewn plates and baskets appear to be floating or suspended in space.

FORBES: Art Review

The laser light dims within seconds when the plastic comes into contact with even the tiniest emission of vapour.

BBC: Plastic lasers shed light on hidden explosives