Spectrum Broadening due to Nonselective Linear Absorption

分类： 物理学 >> 电磁学、光学、声学、传热、经典力学和流体动力学 提交时间： 2021-12-20

Zhang, Xingchu She, Weilong

摘要： The position and linewidth of emission spectrum reflect the physical information inside an object observed. So keeping them from distortion is very important in the measurement of spectrum. However, the emission spectra are not always kept their forms. We let the near-infrared emission of a sodium lamp pass through a nonselective linear absorbing filter and then observe the emission spectrum. It is found that the spectral lines will be broadened when the power of the emission just after the filter becomes low enough, and the lower the transmittance of the filter is, the more obvious the effect is. This is another broadening effect different from the known ones and is likely to be another independent evidence for discrete wavelet structure of classical plane light waves.

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