Argon emitted blue and green light, krypton several other colours, and mixing the two gases made a laser that could emit across the visible spectrum.
氩气产生蓝色和绿色的光，氪产生其他几种颜色，两种气体的混合可以产生整个可见光谱中的颜色。
2
In the new study, the physicists shot xenon atoms with FLASH, an X-ray laser that USES intense photons in the extreme ultraviolet energy range, about forty times the energy of visiblelight.
The pumping light wave and the laser oscillation wave are determined by the ultraviolet-visible absorption spectra and fluorescence spectra, respectively.