[學習] 三個問題想請教各位大大
小弟剛結束儀器分析的期末考
由於錯的部分需要訂正
有三題不懂 想請各位解惑~~
1.Assume the excitation sources of a helium/non laser(632.8nm) and an
argon-ion laser(488nm) have the same power. (a) Compare the relative
intensities of the CCl4 Raman lines when each of the two excitation
sources is used. (b) If the intensities were recorded with a typical
monochromator/photomultiplier system, why would the measured intensity
ratios differ from the ratio calculated in part(a)?
(a)我寫的答案是 Raman 光譜之訊號強度與入射光功率成正比，所以氦氖之頻率
會小於Ar-ion頻率，而功率固定，所以Raman之訊號強度：Ar-ion會大於氦氖雷射。
然而(b)部分需要人解惑一下
接下來兩題要判別對錯，並探討為何對或錯
2.Because of the potential of unlimited mass range, time-of-flight mass
spectrometer has become a workhorse for the analysis of macromolecules.
3.The resolution of an electron microscope is limited by the diameter of
the backscattered beam, which has a much larger diameter than the incident
beam.
感謝各位耐心看完
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