Tsab xov xwm hais txog Ray daim duab rau daim iav convex
Yog tias ib yam khoom nyob rau pem hauv ntej ntawm daim iav convex uas cuam tshuam lub teeb, daim iav convex yuav tsim cov duab ntawm yam khoom. Yog tias paub qhov deb ntawm yam khoom ntawm daim iav convex, yuav ua li cas kos cov duab ntawm yam khoom? Xav tias ib yam khoom nyob rau pem hauv ntej ntawm daim iav convex, raws li qhia hauv daim duab hauv qab no.
Txoj kab txiv kab ntxwv = daim iav convex
Kab xiav = lub axis tseem ceeb
xub ntsuab = khoom
R = qhov chaw ntawm qhov nkhaus ntawm daim iav convex
f = qhov tsom ntawm daim iav convex
Cov duab ntawm cov khoom tau los ntawm kev kos duab tag nrho cov teeb ci uas hla dhau cov khoom, tab sis qhov no tsis yooj yim vim tias yuav muaj ntau kab sawv cev rau cov teeb ci. Rau kev yooj yim, tsuas yog ob peb lub teeb ci raug xaiv los sawv cev rau tag nrho cov teeb ci uas hla dhau cov khoom. Vim tias qhov xwm txheej no cuam tshuam nrog kev cuam tshuam ntawm lub teeb, txoj cai ntawm kev cuam tshuam ntawm lub teeb yuav tsum tau ua raws li thaum kos duab tsim.
Daim duab qhia txog txoj kab
1:
Lub teeb ci 1 lossis lub teeb ci 1 uas los rau ntawm daim iav convex raug kos sib luag rau lub axis tseem ceeb thiab kov qhov kawg sab saud ntawm cov khoom,
ces daim iav convex raug cuam tshuam, qhov twg lub teeb ci ntsa iab zoo li los ntawm qhov chaw tseem ceeb (f). Lub teeb nkag los thiab lub teeb cuam tshuam yuav tsum ua tiav txoj cai ntawm kev cuam tshuam ntawm lub teeb, qhov twg lub kaum sab xis ntawm qhov cuam tshuam sib npaug rau lub kaum sab xis ntawm kev cuam tshuam.
2:
Lub teeb ci 2 lossis lub teeb ci 2 uas nkag mus rau hauv daim iav convex raug rub kom kov qhov kawg sab saud ntawm cov khoom,
thiab mus rau qhov chaw sib tshuam ntawm lub axis tseem ceeb nrog daim iav convex, ces lub teeb ntawm lub teeb raug cuam tshuam. Lub teeb nkag los thiab lub teeb cuam tshuam yuav tsum ua tiav txoj cai ntawm kev cuam tshuam ntawm lub teeb, qhov twg lub kaum sab xis ntawm qhov cuam tshuam sib npaug rau lub kaum sab xis ntawm kev cuam tshuam.
3:
Lub teeb ci 3 lossis lub teeb ci 3 uas nkag mus rau hauv daim iav convex raug rub mus rau qhov chaw nruab nrab ntawm qhov nkhaus ntawm daim iav (R) thiab kov qhov kawg sab saud ntawm cov khoom,
ces daim iav convex raug cuam tshuam zoo li lub teeb ci ntsa iab los ntawm qhov chaw nruab nrab ntawm qhov nkhaus. Lub teeb ci ntsa iab sib phim nrog lub teeb ci tuaj. Lub teeb tuaj thiab lub teeb ci ntsa iab yuav tsum ua tiav txoj cai ntawm kev cuam tshuam ntawm lub teeb, qhov twg lub kaum sab xis ntawm qhov cuam tshuam sib npaug rau lub kaum sab xis ntawm kev cuam tshuam. Yog tias lub teeb ci tuaj sib phim nrog lub teeb ci ntsa iab, lub teeb ci yuav tsum yog perpendicular (90o) nrog rau qhov chaw ntawm daim iav convex.
Kev tsim duab (ob lub teeb ci)
Cov duab tsim tau tsuas yog siv ob lub teeb xwb, raws li pom hauv daim duab hauv qab no. Yog tias siv ob lub teeb, muaj peb qhov ua tau los tsim cov duab.
Ray 1 thiab Ray 2
Ray 1 thiab Ray 3
Ray 2 thiab Ray 3
Daim duab ntawm kev tsim duab siv tsuas yog ob lub teeb ci xwb yuav tsum tau kho los ntawm qhov deb ntawm daim iav convex. Yog tias qhov deb ntawm daim iav convex zoo li hauv daim duab saum toj no, ces muaj peb txoj hauv kev los kos duab siv tsuas yog ob lub teeb ci xwb. Yog tias qhov deb ntawm daim iav convex txawv raws li pom hauv daim duab saum toj no, piv txwv li, cov khoom nyob nruab nrab ntawm qhov chaw tsom mus rau qhov chaw thiab qhov chaw nruab nrab ntawm qhov nkhaus; ces tsis tas yuav muaj peb txoj hauv kev los kos duab, tej zaum tsuas muaj ob txoj hauv kev los kos duab.
Yog koj kos duab los ntawm daim iav convex, koj tuaj yeem xaiv ib txoj kev thiab tsis tas yuav siv ob lossis peb txoj kev.
Kev tsim duab (peb lub teeb ci)
Daim duab tsim tuaj yeem kos tau siv peb lub teeb lossis peb lub teeb ci, raws li pom hauv daim duab hauv qab no.
Yog tias qhov deb ntawm daim iav convex tsis zoo li pom hauv daim duab, piv txwv li, yog tias daim khoom nyob nruab nrab ntawm daim iav convex thiab qhov chaw tsom mus rau qhov chaw,
los yog tias yam khoom nyob nruab nrab ntawm qhov chaw tsom mus rau qhov chaw thiab qhov chaw nruab nrab ntawm qhov nkhaus, ces daim duab tsim tsis tuaj yeem kos siv peb txoj hauv kev zoo li hauv daim duab. Tsuas muaj ob txoj hauv kev los kos daim duab tsim. Thov saib cov piv txwv ntawm daim duab tsim los ntawm daim iav convex, qhov twg qhov deb ntawm yam khoom ntawm daim iav convex sib txawv, hais txog kev tsim duab los ntawm daim iav convex.
