diffraction grating
2013-03-26 2:43 am
Diffraction grating can separate different colours from white due to the interfere of diffracted light from a large number of fine slits. But White light is not coherent afterall, why can spectra still be formed?
回答 (1)
2013-03-26 3:44 am
✔ 最佳答案
That's why the white light must first be collimated. Light emergent from a good collimator can be treated as coherent, similar to the one used in the Young's Double Slit Experiment.
收錄日期: 2021-04-29 17:47:36
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https://hk.answers.yahoo.com/question/index?qid=20130325000051KK00272