Lithini ijubane lokukhanya, amakhilomitha amangaki esantya sokukhanya

Siyazi ukuthi kunesivinini esimweni ijubane lokukhanya. Ijubane lokukhanya esikhaleni ngokuvamile liboniswa c. Kusetshenziswa ezingxenyeni eziningi ze-physics. Idonsela ukunakwa njengento ebalulekile engokomzimba engapheli. Cishe zingama-299.792.458 m / s. Ijubane lokukhanya libuye lusetshenziswe kumahlaya amaningi. Vele, inhloso yawo wonke umuntu ukwedlula ijubane lokukhanya. Kodwa-ke, ososayensi abakhona ngezikhathi ezithile ngale ndaba abanazinto ezingokoqobo ezindabeni zomagazini, njengokuthi badlula ijubane lokukhanya, beqa ijubane lokukhanya, noma bathola inhlayiyana ngokushesha kunokukhanya. Ijubane lokukhanya lingamakhilomitha angama-300.000 ngomzuzwana futhi akukho mehendi noma enye into engadlula endaweni yonke ngalesi sikhathi.
Le velocity iyisivinini esiphezulu sokuhamba endaweni yonke lapho izinhlayiya, njengama-Photons, osisindo sawo kubhekiselwa kuzo njengezinhlayiya. Sikhuluma ngamandla anikeza isisindo sento futhi ayivumela ukuba yakhe insimu yokudonsela phansi. Izithombe ezakha ukukhanya azinaso isisindo. Ngokuqondile, izithombe ezisesimweni azinaso isisindo. Yebo, amandla nawo ayadingeka ukuze unyakaze. Njengoba kwaziwa, omunye wabantu abahlakaniphe kakhulu emhlabeni, u-Albert Einstein, udaba namandla akufani, into efanayo iluhlaza okwesibhakabhaka, kepha kuze kube manje asikaqondi ukuthi izindaba namandla zawenza umqondo. Ngomqondo, u-Albert Einstein ubeke phambili ubufakazi nge-E = mc2 equation.
Ngokuphathelene nesivinini sokukhanya, kuyadingeka ukwazi ukuthi abantu abaningi empeleni bazama ukudlula. Kodwa-ke, uma ucabanga ukuthi ukukhanya kuhlala kuhamba njalo, akunakwenzeka ukukudlula, uma ucubungula ubuchwepheshe obukhona okungenani bekhulu lama-21. Ngalo mqondo, ososayensi abaningi muva nje benze umsebenzi othile ukweqisa ijubane lokukhanya, ikakhulukazi okuhlobene nokwakheka komqondo nesivinini somcabango. Vele, izinto eziningi zingahle zidideke lapho ukhuluma ngamandla we-kinetic ahlobene nejubane elingabonakali lilonke. Ngalo mqondo, kungenzeka ukuthi kwabanye ososayensi ukwethula imiphumela ecacile ngokuqhathanisa imithamo emibili ehlukene engathinti amandla adonsela phansi ngendlela ethe xaxa, okuyiqiniso, akunakwenzeka ukuthi inikeze amandla njengedatha ngendlela ecacile, inikezwe iqiniso lokuthi azikho izinsalela ze-photon efanayo, noma ngama-alloys ahlukene. uhlala esesimweni. Ngalo mqondo, kuyadingeka ukusebenza kanzima ukwethula imiphumela ecacile nobufakazi.

Uyini Ijubane Lokukhanya?

Ijubane lokukhanya linamamitha angama-299.792.458 ngomzuzwana, ibanga elingamakhilomitha angama-300.000 futhi litholakala endaweni evulekile. Kuyadingeka futhi ukwazi ukuthi ukukhanya kungukuhlala njalo kwendawo yonke okusizakala ukubala okuningi kwe-physics. Ifanekiselwa yincwadi c ngenxa yegama elithi celeritas, okusho isivinini ngesiLatin. Okokuqala, isazi sefilosofi sasendulo esingumGrikhi u-Empedocles sathi ijubane lokukhanya lilinganiselwe. UBiruni, isazi sangemva kwamaSulumane ku-Empedocles, obeka phambili umbono wokuthi ukukhanya kusuke endaweni kuya kwenye nokuthi kufanele kube nendodakazi ethile, uwamukele lo mbono. Ngemuva kukaBiruni, owathi ukukhanya kukhanya kushesha kunokuzwakala, uGalileo waqala ngezifundo zokulinganisa ijubane lokukhanya.
Kodwa-ke, ngemuva kokwehluleka ukwenza njalo, isazi sezinkanyezi esibizwa ngo-Ole Romer ngonyaka we-1676 sathi ijubane lokukhanya lalingamakhilomitha angama-220.000 ngomzuzwana. Ngenkathi iveza lesi sibalo esisheshayo, ikubeke kucace ukuthi ikala ngephutha lamaphesenti angama-26. Engxenyeni yesibili yekhulu lamashumi amabili, izindlela zokulinganisa bezilungile. Ngo-1950, uLewis Esen walinganisa ijubane lokukhanya esifubeni 299.792.458.

Ijubane Lokukhanya Okungakanani Km?

Ijubane lokukhanya lichazwa njengesivinini sokukhanya emgodini lapho onke amanye amaza e-elekthroniksi ebhekwa. Ezincwadini, kuvame ukushiwo njengamakhilomitha ayizinkulungwane ezingama-300 / kwesibili. Ngalo mqondo, ngokuvamile singayithatha iyunithi yokulinganisa ngokucacile.