1. Chinthu cha kutalika kwa 2 mm chimayikidwa pa 10 cm kuchokera pagalasi lokulitsa . Pafupi ndi mfundo N = 25 cm. Dziwani kukula kwa ngodya ndi kutalika kwa chithunzi.
Zodziwika:
Kutalika kwa chinthu (h o ) = 2 mm
Pafupi ndi malo (N) = 25 cm
Mtunda wa chinthu (do o ) = 10 cm
Kufunidwa: Kukula kwa ngodya (M) ndi kutalika kwa chithunzi (h i )
Yankho:
M = N / s
M = 25 cm / 10 cm
M = 2.5
Kutalika kwa chithunzi = 2.5 x 2 mm = 5 mm.
2. Lenzi yolunjika ya 25 cm imagwiritsidwa ntchito ngati galasi lokulitsa. Dziwani (a) kukula kwa angular pamene diso likuyang'ana pafupi ndi malo ake N = 25 cm (b) kukula kwa angular pamene diso lapumula.
Zodziwika:
Pafupi ndi malo (N) = 25 cm
Kutalika kwa galasi lokulitsa (f) = 25 cm
Chizindikiro chowonjezera chimasonyeza kuti lenziyo ndi lenzi yolumikizana.
Yankho:
(a) kukula kwa angular pamene diso likuyang'ana pafupi ndi N = 25 cm
M = (N/f) + 1
M = (25 cm / 25 cm) + 1
M = 1 + 1
M = 2 X
Ngati kutalika kwa chinthucho ndi 1 cm, kutalika kwa chithunzicho ndi 2 x 1 cm = 2 cm.
(b) kukula kwa angular pamene diso lapumula
M = N / f
M = (25 cm / 25 cm)
M = 1 X
Ngati kutalika kwa chinthucho ndi 1 cm, kutalika kwa chithunzicho ndi 1 x 1 cm = 1 cm.
3. Chinthu cha kutalika kwa 1 cm chimayikidwa patsogolo pa lenzi yolunjika ya 10 cm. Dziwani (a) kutalika kwa chithunzi pamene diso likuyang'ana pafupi ndi malo ake N = 25 cm (b) Kutalika kwa chithunzi pamene diso lapumula.
Zodziwika:
Kutalika kwa chinthu (h o ) = 1 cm
Kutalika kwa focal (f) = 10 cm
Pafupi ndi malo (N) = 25 cm
Yankho:
(a) Kutalika kwa chithunzi pamene diso likuyang'ana pafupi ndi malo ake N = 25 cm
M = (N/f) + 1
M = (25 cm / 10 cm) + 1
M = 2.5 + 1
M = 3.5 X
Ngati kutalika kwa chinthucho ndi 1 cm, kutalika kwa chithunzicho ndi 3.5 x 1 cm = 3.5 cm.
(b) Kutalika kwa chithunzi pamene diso lapumula.
M = N/f
M = 25 cm / 10 cm
M = 2.5 X
Ngati kutalika kwa chinthucho ndi 1 cm, kutalika kwa chithunzicho ndi 2.5 x 1 cm = 2.5 cm.
4. Kukula kwa angular pamene diso lapumula = 5X. Ngati pafupi ndi mfundo = 25 cm, kodi kutalika kwa galasi lokulitsa ndi kotani?
Zodziwika:
Kutalika kwa chinthu (h o ) = 2 mm
Kukula kwa ngodya (M) = 5X
Pafupi ndi malo (N) = 25 cm
Kufunidwa: Kutalika kwa focal
Yankho:
Fomula ya kukula kwa angular pamene diso lapumula:
M = N/f
5 = 25 cm / f
f = 25 cm / 5
f = 5 cm
Utali wa galasi lokulitsa = 5 cm.
5. Munthu amene ali ndi galasi lokulitsa amaona chinthu chomwe kutalika kwake ndi 15 cm. Ngati malo apafupi ndi maso a munthuyo = 30 cm, ndiye kuti dziwani kukula kwa galasi lokulitsa.
Zodziwika:
Malo oyandikira a diso labwinobwino (N) = 30 cm
Utali wa galasi lokulitsa (f) = 15 cm (kuphatikiza chizindikiro chakuti galasi likulumikizana)
Kufunidwa: kukula kwakukulu
Yankho:
Kukula kwakukulu kumachitika pamene diso lili pamalo apamwamba kwambiri. Kukula kwa galasi lokulitsa kumachitika pamene diso lili pamalo apamwamba kwambiri:
M = (N/f) + 1
M = (30 cm / 15 cm) + 1
M = 2 + 1
M = nthawi zitatu
6. Galasi lokulitsira zinthu lokhala ndi mphamvu yowala ya ma diopta 20 lomwe limagwiritsidwa ntchito ndi munthu amene ali ndi maso abwinobwino, 25 cm. Ngati malo ake ndi ochepa, dziwani kukula kocheperako.
Zodziwika:
Pafupi ndi diso labwinobwino (N) = 25 cm
Mphamvu ya galasi lokulitsa (P) = 20 diopters
Kufunidwa: Kukula kochepa
Yankho:
Utali wa galasi lokulitsa:
P = 1/f
20 = 1/f
f = 1/20
f = mamita 0.05
f = 5 cm
Kukula kwa angular pamene malo ogona ndi ochepa:
M = N / f
M = (25 cm / 5 cm)
M = nthawi 5
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