2024 Tus sau: Luke Adderiy | [email protected]. Kawg hloov kho: 2024-01-10 19:34
Thaum nthwv dej taug kev los ntawm ib qho nruab nrab mus rau lwm qhov zaus tsis hloov pauv. Raws li nthwv dej nkag mus rau hauv qhov nruab nrab denser, lawv qeeb thiab wavelength txo qis. … Lub nthwv dej qeeb dua tab sis lub wavelength luv dua lub ntsiab lus zaus tseem zoo li qub.
Lub teeb hloov pauv li cas hauv qhov nruab nrab?
Thaum lub teeb nkag mus rau qhov nruab nrab denser (xws li los ntawm huab cua mus rau iav) lub nrawm thiab wavelength ntawm lub teeb nthwv dej yuav txo qisthaum qhov zaus nyob twj ywm tib yam. Lub teeb qeeb npaum li cas yog nyob ntawm qhov nruab nrab qhov nruab nrab qhov ntsuas ntawm refraction, n. … Lub teeb txav qeeb zuj zus los ntawm cov xov xwm denser vim tias ntau cov khoom nkag mus rau hauv nws txoj kev.
Koj pom qhov wavelength ntawm qhov nruab nrab li cas?
v=f. Muab cov lus qhia saum toj no rau kev tshaj tawm nrog lub ntsiab lus ntawm qhov ntsuas ntawm qhov cuam tshuam, peb pom kev sib raug zoo ntawm wavelength=v / f hauv qhov nruab nrab thiab lub wavelength 0=c/f hauv lub tshuab nqus tsev: Hauv qhov sib npaug saum toj no, cov zaus tso tseg vim qhov zaus tsis hloov raws li lub teeb txav ntawm ib qho nruab nrab mus rau lwm qhov.
Puas hloov xim hauv cov nruab nrab sib txawv?
Thaum lub teeb cuam tshuam los ntawm qhov nruab nrab mus rau qhov thib ob, nws qhov zaus nyob twj ywm tib yam, thiab nws cov wavelength hloov. Yog tias qhov no muaj tseeb, vim li cas peb pom lub teeb hluav taws xob hluav taws xob cov xim zoo ib yam li qhov teeb meem teeb pom kev zoo hauv qhov nruab nrab thib ob? Cov xim yuav tsum tsis txhob zoo ib yam. Yog lub wavelength hloov, xim yuav tsum hloov ib yam nkaus
Vim li cas cov khoom sib txawv ua rau txawv xim?
Cov khoom tshwm sim xim sib txawv vim lawv nqus qee cov xim (wavelengths) thiab cuam tshuam lossis xa lwm yam ximCov xim peb pom yog cov wavelengths uas tau cuam tshuam los yog xa mus.… Cov khoom dawb tshwm dawb vim lawv muaj txhua yam xim. Cov khoom dub nqus tag nrho cov xim kom tsis muaj teeb pom kev.
Pom zoo:
Vim li cas qhov nruab nrab yog qhov kev ntsuas zoo tshaj plaws ntawm kev xav hauv nruab nrab?
Qhov txhais tau tias yog qhov kev ntsuas feem ntau siv ntawm lub hauv paus nyiam vim nws siv tag nrho cov txiaj ntsig hauv cov ntaub ntawv teeb tsa los muab qhov nruab nrab rau koj. Rau cov ntaub ntawv los ntawm skewed distributions, qhov nruab nrab yog qhov zoo dua qhov txhais tau tias vim nws tsis cuam tshuam los ntawm qhov tseem ceeb heev .
Puas yog qhov nruab nrab zoo dua qhov nruab nrab?
Nruab nrab (lossis txhais tau tias) thiab nruab nrab ua lub luag haujlwm zoo sib xws hauv kev nkag siab lub hauv paus nyiam ntawm cov lej. … Yog vim li cas tus nruab nrab yog qhov ntsuas nruab nrab zoo dua rau cov xwm txheej qhov twg tus lej me me tuaj yeem cuam tshuam qhov nruab nrab .
Lub qhov nruab nrab nruab nrab ntawm qhov chaw nyob qhov twg?
Lub anterior nruab nrab fissure (ventral lossis ventromedian fissure) muaj cov quav ntawm pia mater, thiab txuas mus rau tag nrho qhov ntev ntawm medulla oblongata: Nws xaus rau ntawm ciam teb qis dua ntawm cov pons nyob rau hauv ib tug me me daim duab peb sab expansion, termed foramen cecum .
Dab tsi yog qhov nruab nrab ntawm qhov nruab nrab?
Nyob rau hauv daim duab txoj kev xav, nruab nrab ntawm qhov nruab nrab yog qhov ntsuas ntawm qhov nruab nrab hauv daim duab raws li txoj hauv kev luv tshaj. txhais li cas los ntawm nruab nrab ntawm qhov nruab nrab? Nws txhais tau tias yog tus lej ntawm txoj kev luv tshaj plaws hauv daim duab uas dhau los ntawm cov node faib los ntawm tag nrho cov kev luv tshaj plaws.
Puas yog kab nruab nrab yog kab nruab nrab?
Peripherally inserted central catheters (PICC), uas yog cov kab hauv nruab nrab, thiab nruab nrab catheters, uas yog peripheral kab, yog ob hom vascular access devices (VAD) uas tau siv. nquag thiab feem ntau tsis meej pem nrog ib leeg . Yuav ua li cas hom IV yog kab nruab nrab?