Magalasi olumikizirana ndi zida zamagetsi - mavuto ndi mayankho

1. Mphamvu ya lenzi yolumikizirana ndi -5 Diopt ers.

(a) Lenzi yolumikizana ndi lenzi yolumikizana kapena lenzi yosiyana?

(b) Kodi kutalika kwa lenzi yolumikizirana ndi chiyani?

(c) Diso loona pafupi kapena diso loona patali ? Ngati diso loona pafupi, kodi ndiye kuti malo ake apafupi adzakhala otani?

Zodziwika:

Mphamvu ya lenzi (P) = -5 D

Yankho:

(a) Lenzi yolumikizana kapena lenzi yosiyana?

Chizindikiro chochepa cha mphamvu ya lenzi chimasonyeza kuti lenzi yolumikizana ndi lenzi yosiyana.

(b) Utali wa focal?

P = 1/f

-5 = 1/f

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

Kutalika kwa lenzi yozungulira ndi 20 cm.

(c) Diso loona pafupi kapena diso loona patali?

-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

Mtunda wa chithunzi ndi 20 cm. 20 cm ndiye malo akutali a diso loona patali. Kwa diso labwinobwino, malo akutali ndi osatha.

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2. Mphamvu ya lenzi yolumikizirana ndi 1.5 Diopters.

(a) Lenzi yolumikizana ndi lenzi yolumikizana kapena lenzi yosiyana?

(b) Kodi kutalika kwa lenzi yolumikizirana ndi chiyani?

Zodziwika:

Mphamvu ya lenzi (P) = 1.5 Diopters

Yankho:

(a) lenzi yolumikizana kapena lenzi yosiyana

Chizindikiro chabwino cha mphamvu ya lenzi chimasonyeza kuti lenzi yolumikizana ndi lenzi ikugwirizana.

(b) Utali wa focal

P = 1/f

1.5 = 1/f

f = 1/ 1.5 = 0.67 m = 67 cm

Kutalika kwa lens yolumikizana ndi 67 cm.

(c) Diso loona pafupi kapena diso loona patali

-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

Mtunda wa chithunzi ndi 40 cm. 20 cm ndi pafupi ndi nsonga ya diso loona patali. Kwa diso labwinobwino, nsonga yapafupi ndi 25 cm.

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