I-Fenomena Yemvelo Echazwa Yi-Fiziksi
I-physics ivame ukubhekwa njengesihloko esigcwele amafomula kanye nezibalo, kodwa empeleni, isondelene kakhulu nokuphila kwansuku zonke. Cishe yonke into yemvelo esiyibukayo—kusukela ekuweni kwemvula kuya ekwakhekeni kothingo lwemvula kuya ekutheni kungani isibhakabhaka sibonakala siluhlaza okwesibhakabhaka—ingaqondwa ngemibono yemvelo. Ngokutadisha i-physics, asigcini nje ngokukhumbula imibono kodwa futhi sithuthukisa izindlela zokucabanga ukuchaza ukuthi kungani imvelo isebenza ngendlela esibuka ngayo. Lesi sihloko sixoxa ngezenzakalo zemvelo eziningana ezidumile kanye nezincazelo zazo ezimfushane kodwa ezicacile zomzimba.
1. Kungani isibhakabhaka siluhlaza okwesibhakabhaka?
Isibhakabhaka sibonakala siluhlaza okwesibhakabhaka ngenxa yento ebizwa ngokuthi i-Rayleigh scattering. Ukukhanya kwelanga kwakhiwe ngamaza ahlukene (imibala). Lapho lokho kukhanya kungena emkhathini woMhlaba, kuhlangana nama-molecule omoya afana ne-nitrogen ne-oxygen. Lawa ma-molecule amancane asebenza kahle kakhulu ekusakazeni ukukhanya okufushane, njengoluhlaza okwesibhakabhaka no-violet, kunokukhanya okude, njengobomvu.
Nakuba i-violet nayo ihlakazekile ngezinga elikhulu, iso lomuntu lizwela kakhulu kuluhlaza okwesibhakabhaka, kanti nokukhanya okuluhlaza okwesibhakabhaka kuyamuncwa emkhathini. Ngakho-ke, kusuka ezinhlangothini ezahlukene, sithola ukukhanya okuluhlaza okwesibhakabhaka okuhlakazekile, okwenza isibhakabhaka sibonakale siluhlaza okwesibhakabhaka. Ekuphumeni kwelanga noma ekushoneni kwelanga, ukukhanya kudlula emoyeni ojiyile, ngakho ukukhanya okuluhlaza okwesibhakabhaka okuningi kuhlakazekile ngaphandle kwendawo yokubuka, kushiye umbala obomvu nowolintshi ovelele.
2. Uthingo: Ububanzi Bemibala Esibhakabhakeni
Uthingo lwemvula lwakhiwa lapho ukukhanya kwelanga kuhlangana namaconsi amanzi emoyeni, isibonelo ngemva kwemvula. Lesi simo sihilela izinqubo ezintathu eziyinhloko: ukufiphala, ukubonakaliswa kwangaphakathi, kanye nokuhlakazeka.
Uma ukukhanya kungena econsini lamanzi, kuyajikiswa, bese kubonakala ngaphakathi econsini, bese ekugcineni kuphuma futhi nge-refraction yesibili. Ngenxa yokuthi umbala ngamunye unenkomba yokukhanya ehlukile kancane, ukukhanya okumhlophe kuyahlukana kube yimibala ehlukahlukene. Umphumela uba umbala olandelanayo ngendlela ejwayelekile: obomvu, o-orenji, ophuzi, oluhlaza okotshani, oluhlaza okwesibhakabhaka, i-indigo, kanye ne-violet. Indawo yothingo incike ekhoneni eliphakathi kweLanga, umbukeli, kanye neconsi lamanzi. Yingakho uthingo luvame ukubonakala lapho iLanga lingemuva kombukeli kanti amaconsi emvula angaphambili.
3. Umbani Nokuduma: Ugesi Namagagasi Omsindo
Umbani uwukukhishwa kukagesi okukhulu emoyeni. Ngaphakathi kwamafu esiphepho, izinhlayiya zeqhwa, amaconsi amanzi, kanye nemisinga yomoya kuyashayisana, okubangela ukuhlukaniswa kwamacala: ezinye izingxenye ziba zinhle kakhulu, ezinye zibe zimbi kakhulu. Uma umehluko wamandla kagesi umkhulu kakhulu, umoya, ovame ukuba yi-insulator, ungaphuka ube yi-conductor. Yilapho umbani esivame ukuwubona uvela khona.
Ukuduma umsindo okhiqizwa umbani. Umbani ushisa umoya ozungezile ngokushesha okukhulu, okwenza ukhule ngokushesha futhi ukhiqize amaza okwethuka. Lawa maza yilokho esikuzwa njengokuduma kwezulu. Sivame ukubona umbani ngaphambi kokuba sizwe ukuduma kwezulu ngoba ukukhanya kuhamba ngokushesha kakhulu kunomsindo. Ngokulinganisa isikhathi esiphakathi kokukhanya nomsindo, singalinganisa ibanga lesiphepho.
4. Amagagasi kanye namagagasi olwandle
Amagagasi ebusweni bolwandle ngokuvamile akhiwa umoya odlulisela amandla emanzini. Uma umoya unamandla, uvunguza isikhathi eside, futhi indawo yomthelela ibanzi, amagagasi ngokuvamile ayoba makhulu. Ngokombono ongokwenyama, amagagasi ayisibonelo segagasi elisebenza ngomshini: amandla asakazeka ngokusebenzisa indlela (amanzi), kuyilapho izinhlayiya zamanzi zimane zikhuphuke futhi zehle noma zijikeleze kancane, zingahambi ibanga elide njengoba kuvame ukucatshangwa.
Njengoba amagagasi esondela ogwini, ukujula kwamanzi kuyancipha, okwenza iphansi legagasi "lidonswe" yiphansi lolwandle. Ngenxa yalokho, igagasi liyehla, ubude balo besikhathi buyancipha, futhi isiqu salo sikhuphuke kuze kube yilapho ekugcineni liphuka. Lesi simo sichaza ukuthi kungani amagagasi asogwini eziphatha ngendlela ehlukile kunamagagasi asogwini.
5. Amagagasi: Ukudonswa Okudonsela Phansi Kwenyanga Nelanga
Ama-tide ayizinto ezenzeka ngezikhathi ezithile ezithonywa kakhulu ukudonswa kwamandla adonsela phansi kweNyanga, kulandelwe yiLanga. INyanga idonsa amanzi ohlangothini loMhlaba olubheke eNyangeni, okubangela "ukuvuvuka" kwamanzi olwandle. Ngokuthakazelisayo, ukuvuvuka kwenzeka futhi ngakolunye uhlangothi ngenxa yokuhlanganiswa kwamandla adonsela phansi kanye nemiphumela engasebenzi kahle yesistimu yoMhlaba neNyanga. Ngenxa yokuthi uMhlaba uyajikeleza, izindawo ezithile ezisogwini zithola ama-tide aphezulu ngezikhathi ezithile kanye nama-tide aphansi.
Ilanga nalo lidlala indima. Lapho iNyanga neLanga ziqondaniswe (ngesikhathi senyanga entsha noma egcwele), amaza angaphakama kanti amaza aphansi angancipha—okubizwa ngokuthi amaza asentwasahlobo. Lapho lokhu kokubili kwakha i-engeli engama-degree angu-90 (ikota yokuqala/yesithathu), kwenzeka amaza aphansi aphansi.
6. I-Aurora: Ikhethini Lokukhanya Esibhakabhakeni Esinezimpondo
Ama-Aurora ayizibani ezinhle ezivame ukuvela ezindaweni ezibandayo, ezaziwa ngokuthi i-aurora borealis (enyakatho) kanye ne-aurora australis (eningizimu). Lesi simo senzeka lapho izinhlayiya ezishajiwe ezivela eLangeni (umoya welanga) zifika eMhlabeni futhi zixhumana nensimu yamagnetic yoMhlaba. Insimu yamagnetic iqondisa izinhlayiya ezindaweni ezibandayo, lapho imigqa yamandla yamagnetic "ingena" khona emoyeni.
Uma lezi zinhlayiya zishayisana nama-athomu nama-molecule asemkhathini, zidlulisela amandla. Ama-athomu noma ama-molecule avuselelwe abe esekhipha la mandla ngesimo sokukhanya. Umbala we-aurora uncike ohlotsheni lwegesi kanye nokuphakama: umoya-mpilo ungakhiqiza okuluhlaza noma okubomvu, kuyilapho i-nitrogen ivame ukukhiqiza okuluhlaza okwesibhakabhaka noma okunsomi.
7. Kungani Izinto Ziwa Phansi?
Izenzakalo ezilula njenge-apula eliwa esihlahleni zichazwa ngamandla adonsela phansi. Ngokusho kukaNewton, zonke izinqwaba ziyadonselana. Umhlaba, ngenxa yobukhulu bawo obukhulu, udonsela izinto eziseduze, okubangela ukuba zihambe ziye enkabeni yoMhlaba. Ukusheshisa okubangelwa amandla adonsela phansi ebusweni boMhlaba kuyisilinganiso esingaba ngu-9,8 m/s², yize kungahluka kancane kuye ngendawo.
Ngezinga elikhulu, amandla adonsela phansi achaza ukuthi kungani amaplanethi ejikeleza iLanga, ukuthi kungani iNyanga ijikeleza uMhlaba, nokuthi kungani kwakheka imithala. Ngezinga lesimanje, u-Einstein wachaza amandla adonsela phansi njengokugoba kwesikhala nesikhathi, kodwa ezimweni eziningi zansuku zonke, indlela kaNewton yanele.
8. Imvula Namafu: Izinguquko Zesigaba kanye neThermodynamics
Amafu akheka ngenqubo yokuminyana. Amanzi ebusweni bomhlaba ayahwamuka, akhuphuke nomoya ofudumele, bese ephola ezindaweni eziphakeme. Umoya opholile awukwazi ukubamba umhwamuko wamanzi omningi njengomoya ofudumele, ngakho-ke ujiya ube amaconsi amanzi amancane noma amakristalu eqhwa. Lawa maqoqo amaconsi yilokho okubonakala njengamafu.
Imvula yenzeka lapho amaconsi amanzi emafwini ekhula ngenxa yokushayisana nokuhlangana, noma ukushintsha kwesigaba kusuka eqhweni kuya emanzini, aze abe nzima ngokwanele ukuwa nokunqoba ukumelana nomoya. Le nqubo ithonywa amandla omoya, izinga lokushisa, ingcindezi, kanye nomswakama—konke okuwela ngaphansi kwefiziksi, ikakhulukazi i-thermodynamics kanye ne-fluid mechanics.
I-Penutup
Izenzakalo zemvelo ezibonakala zimangalisa zivame ukuchazwa ngokunengqondo nge-physics. Ukusabalala kokukhanya kwenza isibhakabhaka sibe luhlaza okwesibhakabhaka, ukusebenzisana kokukhanya namaconsi amanzi kudala uthingo, ukushaja kukagesi emafwini kubangela umbani, amandla adonsela phansi adala amagagasi futhi enze izinto ziwe, kuyilapho ukusebenzisana komoya welanga kanye namasimu kazibuthe kudala ama-aurora. Ukuqonda i-physics ngemuva kwakho konke lokhu kusenza sibone imvelo hhayi nje njengendawo, kodwa njenge-"laboratory" enkulu esebenza njalo ngokwemithetho ethile. Ngakho-ke, i-physics akuyona nje inkolelo-mbono ekilasini, kodwa iwindi lokuqonda okujulile komhlaba.
