[理工] [近物]-測不準
A laser beam of 500nm wavelength is chopped to 1 picosecond pluses.
What is the uncertainty of wavelength? (Speed of light is approximately
3*10^8 m/s)
(a) 0.88nm (b) 0.14nm (c) 0.02nm (d)Cannot be calcuated without values
of otherphysical constant (e) There is no uncertainty in photons. The
wavelength is still 500nm.
我的想法是
E‧t = h/2
E = h/2t
頻率 =1/2t
波長 = 光速/頻率
不知道這樣的想法錯在那裡?
請好心人指點一下
謝謝!!
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◆ From: 124.6.18.70
※ 編輯: allenwue 來自: 124.6.18.70 (11/07 21:16)