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