Ray - yog ib tug ntawm cov geometric tswv yim. Etymology thiab keeb kwm ntawm cov lo lus

Cov lus uas peb siv, zoo li peb npaj, paub los ntawm thaum yau thiab to taub. Peb xav hais tias peb yeej ib txwm paub dab tsi peb hais thiab peb txhais li cas. Tab sis, yog hais tias koj sim mus nrhiav tau tawm los ntawm tej passer-by rau ntawm txoj kev, piv txwv li, lo lus "beam", ib tug yuav tsis yog suav rau ceev thiab cov lus teb. Tseeb, yog dab tsi?

Lub etymology ntawm lo lus

Peb yuav to taub mus pib nrog cov keeb kwm ntawm cov lo lus. Raws li cov phau ntawv txhais lus ntawm cov Lavxias teb sab lus, lub beam - ib tug nqaj ntawm lub teeb uas los ntawm txhua qhov chaw, los yog ib tug qhab nqaim ntawm lub teeb tawm txim liab los ntawm lub luminous kwv. Piv txwv li, lub sab ntawm qhov chaw los yog nce hnub.

Lub caij nyoog keeb kwm ntawm lub sij hawm no tsis paub hais tias, tab sis tej zaum, nws originates los ntawm lub Latin lo lus rau "qhov kaj." Nyob rau hauv Slavic lus lo lus yog qhov txhia chaw. Nyob rau hauv Lavxias teb sab nws tau txais lawv cov Laus Slavonic.

Lub ntsiab lus thiab Scope ntawm cov

Lo lus "beam" nyob rau hauv thawj qhov chaw yog txuam nrog tshav ntuj. Yuav ua li cas muaj ntau zaus tau tag nrho cov hnov qhov qhia: "lub hnub lub rays" los yog "duab tshav ntawm lub teeb". Tab sis nyob rau hauv qhov tseeb cov lus no yog ncaj qha txog cov geometry. Nqaj - ib tug ncaj ib feem, uas yog bounded nyob rau hauv ib tes taw tes thiab nyob rau lwm yam - yog infinite.

Tej yam hauv lub beam yog ib tug huab point. Qhov no yog qhov pib ntawm lub beam. Txij li thaum nws tsis muaj hnub kawg, nws yog feem ntau denoted los ntawm ib tug tib tsab ntawv. Nyob rau hauv tas li ntawd, lub beam - qhov no yog ib tug ntawm cov nyuaj geometric duab, xws li ib tug kab los yog ib tug tawg kab.

Lub tswvyim ntawm cov nqaj kuj yog siv nyob rau hauv physics, tiam sis tsuas yog nyob rau hauv acoustics thiab duab optics. Ntawm no, cov beam - qhov no yog qhov kab raws uas teeb lub zog yog tsiv.

Lub ntsiab feature ntawm lub geometric thiab lub teeb beam - nws yog lawv straightness. Tab sis qhov no teeb yog tseeb tsuas yog nws kis nyob rau hauv ib tug niaj hnub pob tshab nruab nrab. Txwv tsis pub, nws yuav nkhaus.

Yuav ua li cas pom qhov kaj

Qhov no yog heev qab ntxiag mus rau cov me nyuam, nws yuav graphically qhia lawv zoo li cas ib tug duab tshav ntawm lub teeb. Rau no yooj yim kev npaj yuav tsum tau. Nws yog tsim nyog yuav tsaus ntuj hauv chav tsev thiab muab tso rau hauv lub ntug ntawm lub rooj tej teeb khoo. Ib tug nqaj ntawm lub teeb yog tam sim no nyuam qhuav pom, tab sis, yog hais tias koj dramatically hlob lub pre-npaj yas lub raj mis uas talcum hmoov los yog tus me nyuam hmoov raws li hmoov hais, ib zaug nyob rau hauv nws, pib ci. Tam sim no cov me nyuam yuav pom tias lub teeb beam - ib tug sawb ntawm lub teeb emanating los ntawm lub teeb thiab ntxiv mus rau hauv infinity. Yog vim li cas yog no mas? Lub fact tias lub teeb yuav tsis tau pom kom txog rau thaum ces, kom txog thaum nws yog reflected los ntawm tej qhov chaw. Talc hais, ib zaug nyob rau hauv ib tug nqaj ntawm lub teeb, ua rau nws kom meej meej pom.