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来源Q?a href='http://www.wquant.com/news/100.html'>http://www.wquant.com/news/100.html发布旉Q(ben)?016-10-24
當光(zui)與物質相(bang)作()時Q(ben)(ben)(ben)?1)(xiao)所q的(juan)(ling)(lang)(tiao)^是(yi)(yang)(shen)(fu)現Q(ben)(ben)(ben)(chu)(chu)在我們要問(xi)在什麼條(xi)下Q(ben)(ben)(ben)(han)(zui)波經(jing)(lang)(tiao)質時(lian)有(shi)攑֤的作()?前面已提()Q(ben)(ben)(ben)(han)()(())熱^衡狀態下Q(ben)(ben)(ben)(han)原(zeng)(zeng)處(chen)高低階能(shi)量的(suo)目分(gong)為L茲曼分(gong)Q(ben)(ben)(ben)(chu)(chu)(wei)(ling)(jing)(lang)此物質(xiu)(xiu)()(ren)(wei)(ling)(yang)(gao)(lang)(tiao)^是(yi)(lang)大於(jian)(zui)的(juan)過(lian)E?因為N1>>N2)Q(ben)(ben)(ben)(shen)(xi)在()(())(shu)情()況下Q(ben)(ben)(ben)(shen)觀(fen)(fen)不到光(zui)的(juan)大現象,(ren)只能(shi)觀(fen)(fen)(zeng)(zeng)(lang)(wei)(ling)(yang)(gao)(jue)(juan)(bo)(mo)(mo)如(man)在()(())外來(jian)量()Ȁ(jian)gQ(ben)(ben)(ben)物質(juan)處於高(pei)(jian)階(suo)大g(jian)階的(juan)(gui)目,(ren)則(pian)(xiu)(xiu)光(zui)的(juan)(yao)(jian)放過(lian)E(pin)(pin)壓倒激(jian)(jian)攉(duo)(lian)E,(ren)而ɋȀ(jian)放占(zi)(juan)dC(qin)((nie)發攑ְ(cui)E(pin)(pin)(guan)略)Q(ben)(ben)(ben)(shu)時在高(pei)低能(shi)階(tiao)(suo)目分(gong)Eq(suo)分布倒反(populationinversion)Q(ben)(ben)(ben)(han)()是產()雷必備(yu)條g(mo)(mo)?
當光(zui)與物質相(bang)作()時Q(ben)(ben)(ben)?1)(xiao)所q的(juan)(ling)(lang)(tiao)^是(yi)(yang)(shen)(fu)現Q(ben)(ben)(ben)(chu)(chu)在我們要問(xi)在什麼條(xi)下Q(ben)(ben)(ben)(han)(zui)波經(jing)(lang)(tiao)質時(lian)有(shi)攑֤的作()?前面已提()Q(ben)(ben)(ben)(han)()(())熱^衡狀態下Q(ben)(ben)(ben)(han)原(zeng)(zeng)處(chen)高低階能(shi)量的(suo)目分(gong)為L茲曼分(gong)Q(ben)(ben)(ben)(chu)(chu)(wei)(ling)(jing)(lang)此物質(xiu)(xiu)()(ren)(wei)(ling)(yang)(gao)(lang)(tiao)^是(yi)(lang)大於(jian)(zui)的(juan)過(lian)E?因為N1>>N2)Q(ben)(ben)(ben)(shen)(xi)在()(())(shu)情()況下Q(ben)(ben)(ben)(shen)觀(fen)(fen)不到光(zui)的(juan)大現象,(ren)只能(shi)觀(fen)(fen)(zeng)(zeng)(lang)(wei)(ling)(yang)(gao)(jue)(juan)(bo)(mo)(mo)如(man)在()(())外來(jian)量()Ȁ(jian)gQ(ben)(ben)(ben)物質(juan)處於高(pei)(jian)階(suo)大g(jian)階的(juan)(gui)目,(ren)則(pian)(xiu)(xiu)光(zui)的(juan)(yao)(jian)放過(lian)E(pin)(pin)壓倒激(jian)(jian)攉(duo)(lian)E,(ren)而ɋȀ(jian)放占(zi)(juan)dC(qin)((nie)發攑ְ(cui)E(pin)(pin)(guan)略)Q(ben)(ben)(ben)(shu)時在高(pei)低能(shi)階(tiao)(suo)目分(gong)Eq(suo)分布倒反(populationinversion)Q(ben)(ben)(ben)(han)()是產()雷必備(yu)條g(mo)(mo)?
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