Blackbody radiation kuma ta

Yana kira a baki jiki kamar haka saboda kawai yana garwaya da duk fall a kan shi (ko kuma wajen shi) radiation a bayyane bakan da kuma bayan. Amma idan jiki ba mai tsanani, da samar da makamashi da aka sake jefarwa da baya. Wannan radiation aka jefarwa da wani baki da jiki, shi ne na musamman sha'awa. A farko yunkurin karatu da kaddarorin da aka za'ayi ko kafin fitowan na model kanta.

A farkon karni na 19th, Dzhon Lesli gudanar da wani gwaji tare da daban-daban abubuwa. Kamar yadda ya juya waje, ba kawai black toka garwaya da duk abin da ya faru a ta gani haske. Ta radiated a infrared iyaka ne da yawa da karfi fiye da sauran, da m abubuwa. Da shi shi ne kadan radiation cewa ne daban-daban daga dukan sauran iri mahara Properties. A radiation blackbody ma'auni, kama, babu wani makamashi canja wuri da kuma dogara a kan yanayin jiki. A isasshe high zafin jiki na abu da thermal radiation aka sanya a bayyane, sa'an nan wani jiki ciki har da wani blackbody yakan mallaki launi.

Wannan musamman abu wanda fitarda kawai a wasu irin makamashi, ba zai iya kasa su jawo hankalin da hankali. Tun da muna magana ne game da thermal radiation, na farko dabarbari da theories game da yadda bakan kamata kama, an samarwa a cikin tsarin Thermodynamics. Gargajiya thermodynamic zai iya sanin abin da zango ya zama a kalla radiation a ba da zazzabi, a cikin abin da shugabanci da kuma yadda ya za ta motsa a kan dumama da kuma sanyaya. Duk da haka, shi ya gaza to hango ko hasashen yadda za a samar da makamashi rarraba a bakan wata blackbody a duk wavelengths, da kuma musamman, a cikin ultraviolet kewayo.

Bisa ga Concepts na gargajiya thermodynamic, da makamashi za a iya jefarwa da wani rabo, ciki har da yadda kananan kamar yadda ake so. Amma ga baki jiki zai emit a guntu wavelengths, da samar da makamashi na wasu da barbashi dole ne manya-manyan, kuma shi zai tafi to rashin iyaka a fagen ultra-short tãguwar ruwa. A gaskiya wannan ba zai yiwu, akwai rashin iyaka a cikin lissafai da ake kira da ultraviolet bala'i. Kawai Planck ka'idar cewa makamashi za a iya jefarwa a hankali rabo - kamfani mai suna Quanta - taimaka wajen warware wahala. Yau thermodynamic lissafai ne lokuta na musamman na lissafai na jimla kimiyyar lissafi.

Asali mai baki jiki wakilta a matsayin mai kogo da kunkuntar bude. Radiation waje samun shiga irin wannan kogo da kuma tunawa da ganuwar. A da bakan da radiation, wanda ya kamata a yi baki jiki, a wannan yanayin, kama da watsi bakan daga kogon ƙofar, da kyau rami, wata taga a wani duhu dakin a ranar da rana, da dai sauransu Ã'a, mafi yawansu duk tare da shi guda a jere na cosmic obin na lantarki bango radiation na sararin samaniya da taurari, ciki har da rana.

Yana da hadari a ce da mafi wani musamman abu na barbashi da ciwon daban-daban kuzari, da more shi zai kama blackbody radiation. makamashi rarraba kwana a bakan wata blackbody nuna ilimin kididdiga regularities a cikin tsarin na barbashi, tare da kawai bambancin da makamashi daukar kwayar cutar a cikin hulda da mai hankali.