Aragti fog iyo aragti fog - dhibaatooyinka iyo xalalka
1. Ilmaha wax maqla ee n wax maqla wuxuu buug ka akhrin karaa meel u dhow 1 mitir. Si uu wax ugu akhriyo masaafada akhriska caadiga ah ee 25 cm, go'aami awoodda muraayadda waa in ilmuhu isticmaalo.
Xalka:
Ilmuhu wuxuu la ildaran yahay indho fog , halkaas oo meesha u dhow indhihiisu ay tahay 1 mitir ama 100 cm. Barta u dhow isha caadiga ah waa 25 cm. Isha waxaa lagu caadiyeyn karaa muraayad qaloocan.
La yaqaan:
Barta u dhow = masaafada sawirka (s') = -100 cm
Hoosku waa inuu hor yaallaa muraayadda qaloocan si loo arko. Maadaama hoosku uu hor yaal muraayadda qaloocan markaa sawirku waa mid casri ah oo calaamadaysan.
Masaafada akhriska caadiga ah = masaafada shayga (yada) = 25 cm
La Doonayo : Awoodda Muraayadaha
Xalka:
Dhererka diiradda ee muraayadda qaloocan (f):
1/f = 1/s + 1/s' = 1/25 – 1/100 = 4/100 – 1/100 = 3/100
f = 100/3 cm
f = (100/3: 100) m
f = (100/3 x 1/100) m
f = 1/3 m
Awoodda muraayadda qaloocan (P):
P = 1 /f = 1: 1/3 = 1 x 3/1 = 3 Diopters.
Awoodda muraayadda convex waa 3 diopters.
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2.
Iyada oo ku saleysan sawirka kore, go'aami cilladda isha ee loo isticmaalo in lagu caadiyeeyo isha.
Solution
Cilladaha indhaha: aragti fog
Iftiinka iftiinka waxaa si sax ah loogu eegi karaa retina marka muraayad qaloocan la dhigo horteeda isha. Muraayadaha kala duwan waxay gacan ka geystaan fidinta iftiinka si uu si sax ah ugu fiirsado retina.
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3. Qofku wuxuu wax ku akhrin karaa masaafada ugu dhow ee 50 cm. Si uu wax ugu akhriyo masaafada 30 cm, go'aami awoodda muraayadda indhaha.
Xalka:
Qofka waxaa ku dhaca indho la'aan , muraayadaha loo isticmaalo in lagu caadiyeeyo indhaha aan arag lahayn waa muraayadaha wareegsan ama muraayadaha isku dhafan ama muraayadaha togan.
Si shayga la arkay uu u ahaado 30 cm horteeda isha, muraayaddu waa inay sawir ka sameysaa masaafo dhan 50 cm horteeda isha. Sawirku wuxuu hor yaallaa muraayadda si sawirku u noqdo mid toosan oo casri ah.
La yaqaan:
Masaafada shayga (yada) = 30 cm
Masaafada sawirka (yada) = -50 cm ( taban sababtoo ah qaab-dhismeed casri ah )
La Raadinayo: Awoodda muraayadda (P)
Xalka:
Dhererka diiradda:
1/f = 1/s + 1/s'
1/f = 1/30 + 1/-50
1/f = 5/150 – 3/150
1/f = 2/150
f = 150/2 = 75 cm = 0.75 mitir = 75/100 mitir s
Dhererka diiradda la saaray ee togan macnaheedu waa muraayadda la isticmaalay waa muraayad wareegsan.
Awoodda muraayadda:
P = 1/f
P = 1: 75/100 = 1 x 100/75
P = 100/75
P = 4/3 Diopters
