Xim kub

Lub tswvyim, nws nyob rau hauv lub npe ntawm qhov tsab xov xwm, yog dav thov nyob rau hauv lub teb ntawm science thiab tswv yim ua si, raws li astrophysics, zus tau tej cov ntau hom teeb thiab cov ntxaij lim dej. Lub cev xwm ntawm lub phenomena tias characterize cov xim kub, yog hais tias nws tsim ib lub hom phiaj hauv paus rau lub xaav ntawm cov xim los ntawm tib neeg lub qhov muag. Nyob rau hauv ib tug ntau txoj kev txhais lus, nws qhia tau hais tias lub spectral qauv ntawm cov tawg tawm txim liab los ntawm ib tug kev qhov twg los. Txij li thaum cov xim xaav qhov muag yog lom zem ntau txiav txim los ntawm subjective yam ntxwv ntawm tus tib neeg lub cev, lub paj hlwb mob, pom tau qhov sib system tsis, lub spectral thaj chaw ntawm objectification rau kev siv tshwj xeeb xim faib scale nyob rau qhov twg los kub.

Piv txwv li, cov xim kub ntawm pib ntawm nrig txog kev pom kev xaav ntawm tus tib neeg qhov muag rau kub tshuaj los yog lub cev yog 800 K.

Qhov no feem characterizes cov kev siv ntawm cov tawg qhov chaw nyob rau hauv lub kho qhov muag ntau yam. Nws tseem ceeb yog ntsuas nyob rau hauv Kelvin.

Raws li cov experimentally tsim qauv, ib tug tswm ciab lub teeb yuav pom thaum kub 1500-2000 K, thiab yooj yim glow filament teeb hwj chim ntawm 40 watts yuav observable ntawm 2000 K. Nyob rau hauv dav dav, lub xim kub ntawm incandescent teeb yog txiav txim los ntawm lawv muaj peev xwm thiab yog nyob rau hauv ntau ntawm 2000 K rau 3000 K, rau feem ntau cov qauv ntawm cov kev pab (40 - 200 W). Cov feem ntau teeb siv nyob rau hauv Shooting thiab kinovosproizvodyaschey technology muaj kub 3200-3250 K. hnub thaum nkag mus kawm rau lub qab ntug no mas, yog hais tias tus xim kub yog 3000 K, thaum tav su - 5000 K, tab sis cov huab, ua pom, yuav tsum " sov "yog twb mus txog rau 5500 K.

Cov climatic phenomena siab kub muaj ib tug meej lub ntuj xiav nrog lub caij ntuj no kub ntawm 15000 K, thiab tib lub phenomenon nyob rau hauv sab qaum teb latitudes, qhov twg cov xim kub tej zaum yuav mus txog qhov tseem ceeb ntawm 20,000 K.

Feem ntau cov ntaub ntawv uas tib neeg yuav txaus siab rau, qhov no daim duab yog, ntawm chav kawm, cov kev siv ntawm ntau hom teeb pom kev zoo fixtures, teeb nruab. Ntawm no, piv txwv li, yog tam sim no dav siv nyob rau hauv tsev thiab lwm qhov chaw fluorescent teeb muaj ib tug ntau dua kub qhov tseem ceeb. Raws li rau cov xim kub fluorescent teeb, nyob ntawm seb nws lwm yam ntxwv, yuav tsum yog los ntawm 2700 mus 7700 K nyob rau ntawm lawv lub siab tshaj plaws recoil.

Parameter xim kub kheev siv nyob rau hauv photography thiab cinematography. Piv txwv li, tej xim zaj duab xis ua nrog ib tug kiag li tsau qhov tseem ceeb ntawm cov xim kub. Qhov no yog tiav los ntawm nws cov high xim zoo. Yog hais tias koj khiav ib tug swb los yog tsis zoo txhaj tshuaj los yog txhaj koob tshuaj tivthaiv nyob rau high school focal lengths, koj xav tau ib tug zaj duab xis uas siv ib tug tshuav nyiaj li cas daim ntawv ntawm cov xim kub - txog 5600 K rau daylight thiab 3200 K rau shooting nyob rau hmo ntuj.

Nyob rau hauv hnub no tus cov koob yees duab kuj thov lub balancing nyhuv, tiam sis qhov no yog ua tiav los ntawm automatic hloov ntawm lub fotoustroystva los yog preset kev xaiv.

Nyob rau hauv lub printing kev lag luam los muab cov khoom zoo, thiab technology yog siv kho cov xim kub ntawm tag nrho cov ua sawv ntawm ntau lawm txheej txheem. Pom ntawm no yog ib tug nqi ntawm 6500 K. Thaum ib tug muab tus nqi ntawm lub teeb qhov chaw generates ultraviolet nyob rau hauv nws cov qauv muaj kev tivthaiv yog tsis ntaus nqi los ntawm cov tib neeg qhov muag. Tab sis ib co ntawm cov khoom nws yog nyob rau hauv xws li ib tug theem ntawm cov xim kub lub teeb mus, uas muab luam khoom rov hais dua thiab originality. Ntxiv mus, siv technologies xws nyhuv yog tiav nyob rau hauv uas lub "whiteness" dawb ntawv nyob rau hauv lub xeev ntau tshaj ib puas feem pua tus nqi.