Magirazi ekuonana ezvishandiso zvemaziso - matambudziko nemhinduro

1. Simba remalenzi ekuonana (contact lens) i5 D iopt ers.

(a) Lenzi yekuonana igirazi rinobatana kana kuti lenzi rinopatsanurana?

(b) Ndeipi nzvimbo inoonekwa negirazi rekuonana (contact lens)?

(c) Ziso rinoona zviri pedyo kana kuti ziso rinoona zviri kure ? Kana riri ziso rinoona zviri pedyo, chii chichava pedyo?

Zvinozivikanwa:

Simba reLenzi (P) = -5 D

Solution:

(a) Lenzi inochinja-chinja kana lenzi inochinja-chinja?

Chiratidzo chekusashanda zvakanaka kwelenzi chinoratidza kuti lenzi yekuonana ndiyo lenzi inochinja-chinja.

(b) Kureba kwenzvimbo yakatarisana?

P = 1/f

-5 = 1/f

f = 1/-5 = -0.2 m = -20 cm

Kureba kwefocal ye lens inoparadzanisa ndeye 20 cm.

(c) Ziso rinoona zviri pedyo kana kuti ziso rinoona zviri kure?

-1/ di _i= 1/f – 1/ do _o

-1/ d _i= -1/20 – 1/~ = -1/20 – 0

-1/ d _i= -1/20

d _i= 20 cm

Kureba kwemufananidzo i20 cm. 20 cm ndiyo nzvimbo iri kure yeziso rinoona zviri kure. Kune ziso rakajairika, nzvimbo iri kure haigumi.

2. Simba regirazi rekuonana i1.5 Diopters.

(a) Lenzi yekuonana igirazi rinobatana kana kuti lenzi rinopatsanurana?

(b) Ndeipi nzvimbo inoonekwa negirazi rekuonana (focal lens )?

Zvinozivikanwa:

Simba reLenzi (P) = 1.5 Diopters

Solution:

(a) lenzi inobatana kana lenzi inopatsanurana

Chiratidzo chakanaka chesimba relenzi chinoratidza kuti lenzi yekuonana iri kusangana nelenzi.

(b) Kureba kwenzvimbo yakatarisana

P = 1/f

1.5 = 1/f

f = 1/ 1.5 = 0.67 m = 67 cm

Kureba kwefocal kwelenzi inoungana ndeye 67 cm.

(c) Ziso rinoona zviri pedyo kana ziso rinoona zviri kure

-1/ di _i= 1/f – 1/ do _o

_-1/ di = 1/67 – 1/25 = 25/1675 – 67/1675 = -42/1675

– d _i= -1675/42 = -40 cm = -0.40 m

d _i= 40 cm

Kureba kwemufananidzo i40 cm. 20 cm iri pedyo nepanotangira ziso rinoona zviri kure. Kune ziso rakajairika, panotangira mufananidzo i25 cm.

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