2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Kev piav qhia: hauv multimode gradded index propogation cov tub ntxhais yog qhov sib txawv ntawm qhov sib txawv.
Nyob rau hauv hom twg ntawm kev nthuav tawm qhov ceev ntawm cov tub ntxhais yog siab tshaj ntawm Lub Chaw thiab txo qis kom nws qis tshaj ntawm ntug?
Ib qib-index fiber, yog li ntawd, yog ib qho uas muaj qhov sib txawv. Qhov ceev tau yog qhov siab tshaj plaws ntawm qhov chaw ntawm cov tub ntxhais thiab txo qis qis rau nws qis tshaj ntawm ntug. Single Mode: Ib hom siv cov kauj ruam-index fiber ntau thiab lub teeb pom kev zoo uas txwv cov kab teeb rau ib qho me me ntawm cov ces kaum, tag nrho ze rau kab rov tav.
Yuav ua li cas hom fiber ntau optical cables qhov ceev ntawm cov tub ntxhais fiber ntau txawv?
Multimode graded-index fiber ntau txo qis qhov cuam tshuam ntawm lub teeb liab los ntawm kab. Nws yog nrog ntau qhov sib txawv. Qhov ceev yog qhov siab tshaj plaws ntawm qhov nruab nrab ntawm qhov tseem ceeb thiab txo qis mus rau qhov qis tshaj ntawm ntug.
Qhov twg yog qhov tseem ceeb los yog cladding?
Nyob rau hauv ib qho fiber ntau optical, lub core yog ib txwm tsawg dua li cov cladding.
Qhov kev tawg yog tshwm sim los ntawm qhov sib txawv ntawm lub sijhawm nthuav tawm ntawm lub teeb rays uas coj txoj kev sib txawv ntawm cov fiber ntau?
Ob hom kev sib cais hauv qab no tuaj yeem cuam tshuam rau qhov sib txuas ntawm cov ntaub ntawv kho qhov muag: Chromatic dispersion-Kev sib kis ntawm lub teeb liab dhau lub sij hawm uas tshwm sim los ntawm qhov sib txawv ceev ntawm lub teeb rays. Modal dispersion-Kev sib kis ntawm lub teeb liab dhau lub sijhawm tshwm simlos ntawm ntau hom kev nthuav tawm hauv fiber ntau.
Pom zoo:
Puas yog txawv txawv thiab txawv txawv lossis cov lus sib txawv?
Cov lus txawv txawv thiab txawv txawv yog synonyms, tab sis txawv ntawm nuance. Tshwj xeeb, alienate tej zaum yuav los yog tsis qhia kev sib cais tab sis ib txwm hais txog kev poob kev hlub lossis kev txaus siab. Dab tsi yog lub ntsiab lus ntawm alienate?
Yuav ua li cas txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau pom kev pom?
Txawm li cas los xij, corneal collagen cross-linking - cov txheej txheem qib siab tau pom zoo los ntawm US Food and Drug Administration (FDA) hauv xyoo 2016 - tuaj yeem txhim kho qhov pom kev hauv cov neeg mob txhua hnub nyoog. Corneal collagen cross-linking (CXL) tsis yog kho rau keratoconus, tab sis nws tuaj yeem pab tiv thaiv tus mob kom tsis txhob mob hnyav.
Nyob rau hauv qhov xwm txheej hauv qab no yog qhov tseem ceeb kom paub txog lub tshuab raj?
Cov khoom phom sij yog qhov txaus ntshai tshwj xeeb vim lawv muab zais hauv qab cov kab dej. Propellers yog qhov nyuaj rau pom thaum submerged, yog li cov neeg yuav tsum tau ceev faj thaum twg lawv nyob ze ntawm lub nkoj tom qab lossis ntawm lub pas dej ua luam dej.
Nyob rau hauv lub hnub qub neutron lub core yog?
Nyob rau hauv lub hnub qub neutron, cov tub ntxhais yog: ua los ntawm compressed neutrons nyob rau hauv kev sib cuag nrog ib leeg. Ob yam tseem ceeb ntawm cov hnub qub neutron yog: kev sib hloov ceev heev thiab muaj zog sib nqus teb. Dab tsi yog lub hauv paus ntawm lub hnub qub neutron?
Leej twg yog bennie nyob rau hauv lub raisin nyob rau hauv lub hnub?
Beneatha Younger ("Bennie") Mama tus ntxhais thiab W alter tus muam. Beneatha yog ib tug neeg txawj ntse. Nees nkaum xyoo, nws mus kawm ntawv qib siab thiab kawm tau ntawv zoo dua li lwm cov Tsev Neeg Hluas. Qee qhov ntawm nws tus kheej kev ntseeg thiab kev xav tau ua rau nws nyob deb ntawm niam txiv.
