Tsanangudzo yeConvex Mirror
Rumwe rudzi rwegirazi rinoshandiswa muhupenyu hwezuva nezuva igirazi rakamonana. Girazi rakamonana igirazi rakakombama, uko pamusoro pegirazi rinoratidza chiedza chinokombama mberi.
Shandisa
Kana wakamboona girazi remudhudhudhu kana remotokari, pamwe unoziva mashandisirwo anoitwa magirazi e convex zuva nezuva. Anoshandiswa semagirazi ekuona kumashure nekuti mufananidzo waanoburitsa mudiki, zvichiita kuti pave nemaonero akawanda. Kunze kwehukuru hwemufananidzo mudiki, mifananidzo yese inogadzirwa ndeyechokwadi kana kuti yekufungidzira. Ndokumbirawo udzidze nezvenyaya iyi. mufananidzo wegirazi rakamonereka kuti ujekese kunzwisisa kwako.
Nzvimbo yekutarisa
Kana pamusoro pegirazi rinoratidza chiedza pakatarisana nechinhu chiri kure zvikuru, chakaita sezuva, chiedza chinoburitswa nezuva chichaenderana nechikamu chikuru chegirazi, sezvakaratidzwa mumufananidzo uri pazasi. Chikamu chikuru mutsetse wekufungidzira wakatarisana nepakati pechiso chegirazi.
Kana uchirova pamusoro pegirazi, chiedza chega chega kana kuti rambi rechiedza rinoteerera mutemo wekuratidzira chiedza. Miranzi yese inoonekwa inoratidzika kunge inobva panzvimbo yegirazi rakapinza (F). Nemamwe mashoko, nzvimbo yekutarisa ipo panotangira mufananidzo wechinhu chiri kure nepamusoro pegirazi uye mufananidzo uyu uri wepakombiyuta.
Kureba kweFocal
Kureba kwefocal (f) ndiko kureba kuri pakati pefocal point (F) nepamusoro pegirazi. Poindi C ndiyo pakati pekukombama kwegirazi. Kureba kwefocal yegirazi ndi f (focal length = f = FQ) uye radius yekukombama kwegirazi ndi r (radius yekukombama = r = CQ = CP).
Mwaranzi wechiitiko unorova girazi paP wobva waratidzwa negirazi, uko mwaranzi unoonekwa uchibva panzvimbo yakananga F. Mutsetse une madotsi CP ndiwo mutsetse wakajairika. Mwaranzi wechiitiko nemwaranzi unodzorwa zvinoteerera mutemo wekuratidzira chiedza apo kona yechiitiko (θ) yakaenzana nekona yekuratidzira (θ) uye kona iyi yakaenzana nekona yetriangle PCQ (θ). Kona yetriangle PCQ yakaenzana nekona yetriangle CPF saka triangle PFC itriangle yakaenzana. Nekuti triangle PFC itriangle yakaenzana saka kureba kwePF kwakaenzana nehurefu hweCF. Nekufunga kuti upamhi hwegirazi hudiki pane radius yekukombama kwegirazi rakatenderedza saka hurefu hwePF hunoonekwa hwakaenzana nehurefu hweFQ. Nekuti CF = PF uye PF = FQ saka CQ = 2 CF = 2 FQ. CQ = r = radius yekukombama kwegirazi uye FQ = f = urefu hwegirazi. Saka zvinogona kugumiswa kuti radius yekukombama kwegirazi (r) = 2 x urefu hwefocal (f) hwegirazi. Masvomhu:
r = 2 f kana f = r / 2
Mvuri
Magirazi akakombama anogona kuumba mifananidzo chaiyo neyechokwadi, nepo magirazi akakombama achingogadzira mifananidzo chaiyo chete. Kuumbwa kwemufananidzo wechinhu negirazi rakakombama kwakatsanangurwa zvakadzama munyaya iyi. mufananidzo wegirazi rakamonereka.
Mumvuri waMaya
Kana chiedza chichienda pamusoro pegirazi chikaratidzwa, divi rechiedza chinoratidzwa rinoita serinobva panzvimbo yegirazi uye pakati pekona yegirazi. Nekuti chiedza hachipfuuri seri kwegirazi, mufananidzo unoumbwa unobva mumvuri chaiwo kana chirotoKana ukaisa skrini panzvimbo ine mufananidzo chaiwo, hapana mumvuri uchaonekwa pachidzitiro.
