Umqondo Wesikhathi Embonweni Wokuhlobana kanye Nezinkanyezi
Isikhathi siyisici esiyisisekelo sendawo yonke, esijulile futhi esiyinkimbinkimbi. Ukuqonda kwethu isikhathi kuye kwashintsha kusuka emiqondweni elula kuya emibonweni eyinkimbinkimbi ehilela ukuhlobana kanye nezinkanyezi. Kulesi sihloko, sizohlola umqondo wesikhathi njengoba kuchazwe yimfundiso ka-Einstein yokuhlobana kanye nendlela esetshenziswa ngayo kusayensi yezinkanyezi ukuqonda indawo yonke.
Umbono ka-Einstein Wokuhlobana
Ubudlelwano Obukhethekile
Ngo-1905, u-Albert Einstein wethula i-Special Theory of Relativity, eyabonisa ukuthi isikhathi nendawo akuzona izinto eziphelele njengoba i-classical Newtonian physics yayicabanga. Ngokusho kwe-special relativity, isikhathi nendawo kuyingxenye yesakhiwo esinezinhlangothi ezine esibizwa ngokuthi i-spacetime. Le mbono iveza imibono emibili eyinhloko:
1. Imithetho yefiziksi iyafana kuzo zonke izinhlaka zokubhekisela ze-inertial.
2. Ijubane lokukhanya endaweni engenalutho liyafana kubo bonke ababuki, kungakhathaliseki ukuthi umthombo wokukhanya uhamba kanjani noma ukuthi umbuki ngokwakhe.
Imiphumela yalo mbono yayishintshashintsha kakhulu. Esinye sazo yisenzakalo esaziwa ngokuthi ukwandiswa kwesikhathi. Lokhu kusikisela ukuthi isikhathi singadlula kancane ezintweni ezihamba ngokushesha uma kuqhathaniswa nezinto ezimile noma ezihamba kancane. Isibonelo, isazi sezinkanyezi esihamba ngesikebhe sasemkhathini cishe ngesivinini sokukhanya singabona isikhathi sidlula kancane kunomuntu ohlala eMhlabeni. Lokhu kuchazwa yi-equation kaLorentz.
Ubudlelwano Okuvamile
Inkolelo-mbono Ejwayelekile Yokuhlobana Umbono ka-Einstein wokuhlobana kwezinto ngo-1915 wandisa lo mqondo ukuze uhlanganise amandla adonsela phansi. Ngokuhlobana kwezinto ngokujwayelekile, amandla adonsela phansi akuwona nje amandla, kodwa umphumela wokugoba kwesikhala-isikhathi ngobuningi namandla. Ubuningi obukhulu bubangela isikhala-isikhathi ukugoba, futhi izinto ezihamba kulesi sikhathi-isikhathi zilandela izindlela ezinqunywe yilokhu kugoba.
Umphumela wokuhlobana okuvamile ngesikhathi waziwa ngokuthi ukwanda kwesikhathi samandla adonsela phansi. Kulesi simo, isikhathi sizohamba kancane eduze kwezinto ezinamandla adonsela phansi. Isibonelo, isikhathi sidlula kancane ebusweni boMhlaba kunasesikhaleni ngenxa yamandla adonsela phansi oMhlaba. Lo mphumela kumele ucatshangelwe kubuchwepheshe be-GPS, lapho amasathelayithi e-GPS asemizuliswaneni ephezulu (anamandla adonsela phansi abuthakathaka) kumele alinganiswe ukuqinisekisa isikhathi esinembile lapho ebekwa ebusweni boMhlaba.
Umqondo Wesikhathi Ku-Astronomy
I-Astronomy yisayensi encike kakhulu ekuqondeni isikhathi. Isikhathi sivumela izazi zezinkanyezi ukuthi zilandelele ukunyakaza kwezinkanyezi namaplanethi, zinqume ubudala bendawo yonke , futhi ziqonde ezinye izinto ezenzeka ezinkanyezini. Kunemiqondo eminingana ebalulekile ku-astronomy ehlobene nesikhathi:
Iminyaka Yokukhanya
Enye yezindlela eziyinhloko izazi zezinkanyezi ezilinganisa ngayo ibanga ukusebenzisa umqondo wonyaka wokukhanya, okuwubude obuhamba ukukhanya ngonyaka owodwa. Ijubane lokukhanya licishe libe amakhilomitha angu-299.792 ngomzuzwana, ngakho unyaka wokukhanya ucishe ube amakhilomitha ayizigidi eziyi-9,46. Ngokuqonda amabanga ezinkanyezi nemithala yezinkanyezi eminyakeni yokukhanya, izazi zezinkanyezi zingathola ukuqonda ngobukhulu kanye nobukhulu bendawo yonke.
Isikhathi Sezinkanyezi
Ku-astronomy, kusetshenziswa izinhlelo zesikhathi ezahlukahlukene ukukala nokurekhoda izenzakalo. Ezinye zazo yilezi:
– Isikhathi Sendawo Yonke (UT): Lesi simiso sesikhathi sisekelwe ekujikelezeni koMhlaba futhi sisetshenziswa njengesilinganiso sesikhathi emhlabeni wonke.
– Isikhathi Esiseceleni: Ngokungafani nesikhathi selanga, esisekelwe endaweni yeLanga, isikhathi esiseceleni sisekelwe ekujikelezeni koMhlaba uma kuqhathaniswa nezinkanyezi ezikude. Sisetshenziswa izazi zezinkanyezi ukukhomba ama-telescope ezintweni ezithile esibhakabhakeni sasebusuku.
– Isikhathi Sasemhlabeni (TT): Lesi yisilinganiso sesikhathi esisetshenziswa kuma-ephemeris noma amathebula ezikhundla zomzimba wasezulwini. Siyacabangela ithonya lamandla adonsela phansi kusuka kwamanye amaplanethi ukuze kutholakale izindawo ezinembile.
Umhleli Wesikhathi Se-Cosmological
Umqondo wesikhathi ku-cosmology uvame ukuhilela izikhathi ezinde kakhulu, ezisondela enkathini yendawo yonke. indawo yonkeOsosayensi basebenzisa amamodeli I-Big Bang ukuchaza imvelaphi yendawo yonke, okulinganiselwa ukuthi kwenzeka eminyakeni engaba yizigidigidi eziyi-13,8 edlule. Ngokutadisha ukukhanya okuvela ezintweni ezikude kakhulu, izazi zezinkanyezi zingabuka emuva ngesikhathi futhi zihlole izimo zokuqala zendawo yonke. Ukukhanya esikutholayo emithaleni eqhele ngezigidigidi zeminyaka yokukhanya empeleni kusenza sibone leyo mithala njengoba yayinjalo lapho isencane.
Imiphumela Yokuhlobana Kwezinto Ezihlobene Nezinkanyezi
Imiphumela yokuhlobana okujwayelekile nayo ibonakala kakhulu kusayensi yezinkanyezi. Isibonelo esisodwa ukubona okungahambi kahle emjikelezweni kaMercury okungenakuchazwa ngokugcwele ngamandla adonsela phansi kaNewtonian. Ukuhlobana okujwayelekile kunikeza ukubalwa okunembile komjikelezo kaMercury ngokubheka imiphumela yokugoba kweLanga kwesikhathi sesikhala.
Ngaphezu kwalokho, umphumela wokwanda kwesikhathi samandla adonsela phansi udlala indima ebalulekile ekuqondeni kwethu imigodi emnyama. Eduze komkhathi womcimbi womgodi omnyama, isikhathi siyehla kakhulu uma siqhathaniswa nomqapheli okude. Lokhu kudala umphumela lapho izinto ezisondela emgodini omnyama zibonakala zimi khona kumbukeli okude.
Umqondo Wesikhathi Kuma-Exoplanet kanye ne-Astrobiology
Ucwaningo ngamaplanethi angaphandle kanye nokwenzeka kokuphila kwamanye amaplanethi luncike kakhulu ekuqondeni isikhathi. Besebenzisa indlela yokuhamba, izazi zezinkanyezi zingabona amaplanethi angaphandle kwesimiso sethu selanga ngokulinganisa ukwehla kokukhanya kwezinkanyezi okwenzeka lapho iplanethi idlula phambi kwenkanyezi ephethe. Isikhathi salolu hambo sinikeza ulwazi olubalulekile mayelana nosayizi weplanethi, umjikelezo, kanye nezinye izakhiwo zayo.
Ithuba lokuphila kwamanye amaplanethi liphakamisa imibuzo eminingi mayelana nesikhathi sezinkanyezi. Ukuphila kungavela kanjani esikhathini esikhulu kangaka? Ingabe ukuphila kwathatha izigidigidi zeminyaka ukukhula, njengoba kwenzeka eMhlabeni, noma ingabe ukuphila kungavela ngokushesha ngaphansi kwezimo ezahlukene?
Isiphetho
Ukuqonda kwethu umqondo wesikhathi kushintshe kakhulu kusukela ekucabangeni okuqondile kweNewton kuya emcabangweni oyinkimbinkimbi kakhulu ngokusebenzisa inkolelo-mbono ka-Einstein yokuhlobana kwezinto kanye nokusetshenziswa kwayo ku-astronomy. Isikhathi asisaphelele, kodwa sithonywa ijubane kanye namandla adonsela phansi. Ku-astronomy, ukuqonda isikhathi kuyisihluthulelo sokulinganisa amabanga, ukulandelela ukunyakaza kwezinto zasezulwini, kanye nokuphenya ngokuvela kwendawo yonke.
Imiphumela yokuhlobana kwezinto kumele icatshangelwe ezinhlobonhlobo zokubukwa kwezinkanyezi, okuhlanganisa ukusetshenziswa kwe-GPS eMhlabeni kanye nokutadisha imigodi emnyama. Ngaphezu kwalokho, ukuhlola i-exoplanet kanye ne-astrobiology kuvula amazinga amasha ekuqondeni kwethu impilo nesikhathi endaweni yonke enkulu.
Njengoba kunokuxhumana okuseduze phakathi kwenkolelo-mbono yokuhlobana kwezinto kanye nesayensi yezinkanyezi, siyaqaphela ukuthi isikhathi sicebile kakhulu futhi siyinkimbinkimbi kakhulu kunalokho esasikucabanga. Ucwaningo luyaqhubeka nokuphenya ngokujulile ezimfihlakalo zesikhathi, isikhala, kanye nendawo yonke uqobo.
