optical transition

optical transition

[′äp·tə·kəl tran′zish·ən]
(physics)
A process in which an atom or molecule changes from one energy state to another and emits or absorbs electromagnetic radiation in the visible, infrared, or ultraviolet region.
References in classic literature ?
The ice-cream was passed around with cake--gold and silver cake arranged on platters in alternate slices; it had been made and frozen during the afternoon back of the kitchen by two black women, under the supervision of Victor.
Such heaped up platters of cakes of various and almost indescribable kinds, known only to experienced Dutch housewives
Grace being said, -- for those people have their grace as well as we --though Queequeg told me that unlike us, who at such times look downwards to our platters, they, on the contrary, copying the ducks, glance upwards to the great Giver of all feasts --Grace, I say, being said, the High Priest opens the banquet by the immemorial ceremony of the island; that is, dipping his consecrated and consecrating fingers into the bowl before the blessed beverage circulates.
And six wooden goblets, and six platters of wood and two of pewter to cat and drink from withal," said the mason, impressively.
A Boston newspaper reporter went and took a look at the Slave Ship floundering about in that fierce conflagration of reds and yellows, and said it reminded him of a tortoise-shell cat having a fit in a platter of tomatoes.
As the barkeeper climbed along up, bowing and smiling to everybody, and at last got to the platform, these tents were jerked up aloft all of a sudden, and we saw four noble thrones of gold, all caked with jewels, and in the two middle ones sat old white-whiskered men, and in the two others a couple of the most glorious and gaudy giants, with platter halos and beautiful armor.
We'll see whether he gives up or not when I take a sharp knife to him," her mother answered; "and as to his looks, a platter full o' gravy makes a sight o' difference with old roosters, and I'll put dumplings round the aidge; they're turrible fillin', though they don't belong with boiled chicken.
Brocklehurst could not see them too; he would perhaps have felt that, whatever he might do with the outside of the cup and platter, the inside was further beyond his interference than he imagined.
The smaller sorts of wild-fowl, of which there was abundance, were not served up in platters, but brought in upon small wooden spits or broaches, and offered by the pages and domestics who bore them, to each guest in succession, who cut from them such a portion as he pleased.
After grace was said, and while the servants clattered in with the meat platters, Robin stood up and said:
Then the swineherd brought them platters of cold meat, the remains from what they had eaten the day before, and he filled the bread baskets with bread as fast as he could.
She felt to the full all the meaning that had lain in Adam's words, and, as she lost sight of him and turned back slowly into the house, she said aloud to herself--for it was her way to speak her thoughts aloud in the long days when her husband and sons were at their work--"Eh, he'll be tellin' me as he's goin' to bring her home one o' these days; an' she'll be missis o'er me, and I mun look on, belike, while she uses the blue-edged platters, and breaks 'em, mayhap, though there's ne'er been one broke sin' my old man an' me bought 'em at the fair twenty 'ear come next Whis- suntide.

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