Ngā Tauira Pātai mō ngā Taputapu Whatu

12 Tauira o ngā Pātai mō ngā Taputapu Whatu

Whakaata Kōpiko

1. Ko te ahua i hangaia e te whakaata kōpiko o tētahi mea he teitei h kei te tawhiti iti iho i te f (f = te roa arotahi o te whakaata) ko...

A. mariko, poutū, whakaiti

B. mariko, poutū, whakanuia

C. tūturu, poutū, whakaiti

D. tūturu, hurihia, whakanuia

E. tūturu, hurihia, whakaitihia

Kōrero

Ko te tauira e whai ake nei o te hanganga o te atarangi he rite ki te pātai i runga ake nei. I runga i tēnei whakaahua, he mariko, he poutū, he whakanuia te atarangi. Ko te whakautu tika ko B.

2. Ki te whakanohoia he mea ki waenganui i te pūwāhi arotahi me te mata o te whakaata kōpiko, ka hangaia te ahua:

(1) whakanuia rua

(2) poutū

(3) he tawhiti whakaahua = tawhiti arotahi

(4) mariko

Ko te kōrero tika ko…

A. 1, 2 me te 3

B. 1 me te 3

C. 1 me te 4

D. 4 anake

E. he tika katoa

Kōrero

Me kī ko te tawhiti o te pūwāhi arotahi, te roa arotahi rānei (f) = 20 cm, ā, ko te tawhiti o te mea (s) = 10 cm, e whakaaturia ana i te ahua i raro nei.

a) Te tawhiti o te atarangi

1/h = 1/h + 1/h'

1/20 = 1/10 + 1/s'

1/20 – 1/10 = 1/s'

1/20 – 2/20 = 1/s'

-1/20 = 1/s'

s' = -20 henemita

Ko te tawhiti atarangi kino he tikanga he mariko te atarangi. He mariko te atarangi nā te mea kāore he mārama e tika ana mā roto. Ka tohuhia tēnei e te rārangi iraira i roto i te ahua.

b) Te whakanui i te ahua

M = -s'/s = -(-20)/10 = 20/10 = 2 ngā wā

Ko te whakanui pai o te ahua ko te tikanga he poutū te ahua. Ka whakanuia te ahua e rua ngā wā.

Ko ngā āhuatanga o ngā atarangi i runga i te ahua me ngā hua tātaitanga i runga ake nei:

1. Whakanuia kia rua ngā wā

2. Tū tika

3. Te tawhiti o te ahua = te roa o te arotahi = 20 cm

4. He āhua mariko

Ko te whakautu tika ko E.

Whakaata Pūpū

3. Ka whakatakotoria he whakaata pūkohu ki tētahi kokonga o te rori. Ina 2 mita te tawhiti o tētahi mea mai i te whakaata, ko te teitei o te ahua i hangaia he 1/16 o te teitei o te mea. Ko te roa arotahi o te whakaata he…

A. 2/15 m

B. 2/17 m

C. 5/8 mita

D. 15/2 mita

E. 17/2 m

Kōrero

E mōhiotia ana:

Te tawhiti o te mea (s) = 2 mita

Whakanuia o te ahua (M) = 1/16 ngā wā

Pātai: Te roa o te arotahi o te whakaata pūkohu

Whakautu:

Tuatahi, tatauhia te tawhiti atarangi (s'):

Ko te tawhiti o te ahua he – 1/8 mita. Ko te tohu kino he tohu mariko te ahua.

Te roa o te arotahi o te whakaata pūkohu (f):

Ko te tohu kino e tohu ana he mariko te arotahi o te whakaata pūkohu.

Ko te whakautu tika ko A.

4. Ko te ahua i hangaia e te whakaata pūkohu me te mea he teitei h kei mua i te whakaata ko...

A. tūturu, poutū, whakanuia

B. mariko, poutū, whakanuia

C. tūturu, poutū, whakaiti

D. tūturu, hurihia, whakanuia

E. mariko, poutū, whakaiti

Kōrero

E ai ki te ahua i te taha, ko ngā āhuatanga o te atarangi he mariko, he poutū, he whakaiti.

Ko te whakautu tika ko E.

Arotahi Pūpū

5. Mai i te kauwhata arotahi kōpiko i runga ake nei, ko te whakanui o te ahua i te 1/s = 3 ko...

A. 1,5 ngā wā

B. 2 ngā wā

C. 3 wā

D. 4 ngā wā

E. 6 ngā wā

Kōrero

E mōhiotia ana:

1/s = 3 henimita ^-1 , s = 1/3 henimita

1/s' = 1 henimita ^-1 , s' = 1/1 henimita = 1 henimita

Pātai: Te whakanui i te ahua (M)

Whakautu:

Whakanuia o te ahua:

M = s' : s

M = 1 henimita : 1/3 henimita

M = 1 henimita x 3/1 henimita

M = 3 ngā wā

Ko te whakautu tika ko C.

Arotahi Kōpiko

6. Ka tau te hihi mārama whakarara ki runga i te karu arotahi kōpiko. I roto i te karu arotahi, ka pāngia te hihi mārama e…

A. te hurihanga o te mārama kia horapa ai

B. whakaata kia horapa te māramatanga

C. te whakaata kia kohia ai ngā hihi

D. whakaata kia kohia ai te māramatanga

E. te whakaata engari ka noho whakarara tonu ngā hihi

Kōrero

Ka taea e ngā whakaata te whakaata i te mārama, engari ka taea e ngā karāhe arotahi te huripokitia te mārama.

He āhuatanga tō ngā karāhe kōpiko ki te hora i te mārama, nō reira e kiia ana hoki he karāhe wehewehe.

Ko te whakautu tika ko A.

Pahua

7. Ka whakamahia he karāhe arotahi he 5 cm te roa o te arotahi hei karāhe whakanui. Mena ka whakamahia e te kanohi noa te karāhe whakanui me te taunga mōrahi, ko te whakanui koki o te karāhe whakanui ko...

A. 3 ngā wā

B. 4 ngā wā

C. 5 wā

D. 6 ngā wā

E. 8 ngā wā

Kōrero

E mōhiotia ana:

Roa arotahi o te karu (f) = 5 cm

Te pūwāhi tata o te kanohi noa (N) = 25 cm

I pātaihia: Te whakanui koki o te karāhe whakanui

Whakautu:

Mena kei te tino pai te urunga o te kanohi, ko te tawhiti o te ahua i hangaia e te karāhe whakanui he rite ki te pūwāhi tata o te kanohi noa. Ko te tātai mō te koki whakanui o te karāhe whakanui ina tino pai te urunga o te kanohi:

Ko te whakautu tika ko D.

Ngā hapa kanohi

8. Me mau mōhiti te tangata e pāngia ana e te hypermetropia me te kaha o te karu o te +2 diopters kia kite noa ai. Nō reira, ko te tawhiti tata rawa atu ka taea e te tangata te kite me te kore mōhiti ko...

A. 2,5 henemita

B. 15 henemita

C. 50 henimita

D. 60 henimita

E. 100 henimita

Kōrero

E mōhiotia ana:

Te kaha o te karu (P) = +2 diopters

Pātai: He aha te tawhiti tata rawa atu ka taea e te tangata te kite me te kore he mōhiti?

Whakautu:

He karāhe kōpiko, he karāhe kōpiko rānei?

He pai te mana o te arotahi, nō reira ko te arotahi e whakamahia ana he arotahi pai, arā, he arotahi kōpuku, arā, he arotahi hūpeke.

He aha te roa o te arotahi o te arotahi?

P = 1/f

2 = 1/w

f = 1/2 = 0,5 mita = 50 cm

Ko te roa arotahi o tētahi karāhe arotahi kōpuku he 50 henemita.

Te tirohanga tata, te tirohanga tawhiti rānei?

Mena he karāhe arotahi pūkohu te karāhe arotahi e whakamahia ana, he karāhe tirohanga tata tōna.

He aha te tawhiti tata rawa atu ka taea e te kanohi te kite me te kore he mōhiti?

Ko te pūwāhi tata o te kanohi noa he 25 cm. Kia taea ai e te kanohi te kite i tētahi mea i te tawhiti o te 25 cm pērā i te kanohi noa, me hanga e te karu arotahi he ahua i te tawhiti o te x cm i mua i te karu arotahi. Kei mua te ahua i te karu arotahi kōpiko kia poutū ai, kia mariko ai te ahua. He mariko te ahua, nō reira he kino te tawhiti (s') o te ahua.

-1/s' = 1/f – 1/s

-1/s' = 1/50 – 1/25 = 1/50-2/50 = -1/50

-s' = -50/1 = -50 henimita = -0,50 mita

s' = 50 henimita = 0,5 mita

Ko te tawhiti tata rawa atu ka taea e te kanohi kite tata te kite ko te 50 cm. Ko te tawhiti tata rawa atu mō te kanohi noa ko te 25 cm.

Ko te whakautu tika ko C.

Ngā mōhiti

9. Ko te tawhiti tata o te tangata e pāngia ana e te presbyopic he 50 cm. Ki te hiahia ia ki te pānui i te tawhiti pānui noa, me whai mōhiti ia he kaha o...

A. -2 diopters

B. -1/2 dioptera

C. + 1/2 dioptera

D. +2 diopters

E. +4 diopters

Kōrero

Ko te pūwāhi tata o te kanohi noa he 25 cm, ā, ko te pūwāhi tata o te tūroro he 50 cm. Ko te tikanga he uaua ki te tangata te kite tata, he āhuatanga e mōhiotia ana ko te tirohanga tawhiti. Ka taea te whakatika i te tirohanga tawhiti mā te whakamahi i te karu arotahi kōpikopiko, e whakaaturia ana i te ahua i raro nei.

Kia kitea ai tētahi mea i te tawhiti o te 25 cm i mua i te kanohi, me hanga e te arotahi he ahua i te tawhiti o te 50 cm i mua i te kanohi me te arotahi. Me noho te ahua ki mua i te kanohi kia kitea ai, kia poutū ai, kia mariko ai te ahua.

E mōhiotia ana :

Te tawhiti o te mea (s) = 25 cm

Te tawhiti o te ahua (s') = -50 cm (kino nā te mea he mariko)

Pātai : Te roa arotahi (f) o ngā mōhiti me te mana arotahi (P)

Whakautu :

1/h = 1/h + 1/h'

1/f = 1/25 + 1/-50

1/f = 2/50 – 1/50

1/f = 1/50

f = 50/1 = 50 cm = 0,5 mita

Ko te roa arotahi pai ko te arotahi e whakamahia ana he arotahi kōpuku.

P = 1/f = 1/0,5 = +2 Ngā Diopter

Ko te kaha, te mana rānei o te arotahi he +2 D. Ko te tohu pai e tohu ana he arotahi kōpikopiko te arotahi e whakamahia ana.

Ko te whakautu tika ko D.

He Mikroskop

10. He karu arotahi me he karu karu ā-kanohi kei roto i te karu tirotiro, ko te roa o te arotahi he 0,9 cm me te 5 cm. Ka whakatakotoria e te tangata he tauira 10 mm ki mua i te karu arotahi kia tirohia mā roto i te karu karu, engari kāore e taurite. Mena he 0,5 mm te roa o te mea tauira, ā, ko te tawhiti pānui noa o te tangata he 25 cm, ko te roa kitea o te mea ka...

A. 7,5 mm

B. 10 mm

C. 12,5 mm

D. 15 mm

E. 20 mm

Kōrero

E mōhiotia ana:

Te roa o te arotahi o te arotahi arotahi (f _ob ) = 0,9 cm = 9 mm

Te tawhiti arotahi o te karu arotahi (f _ok ) = 5 cm = 50 mm

Te tawhiti o te mea mai i te arotahi arotahi (s _ob ) = 10 mm

Te roa o te mea (h) = 0,5 mm

Te pūwāhi tata o te kanohi noa (N) = 25 cm = 250 mm

Pātai: Te roa o te atarangi (h')

Whakautu:

He rite te mātakitaki kāore he taunga ki te mātakitaki kāore he taunga iti, arā, ka whakangā te kanohi ina mātakitaki ana i tētahi ahua e tawhiti rawa ana.

Tuatahi, tatauhia te tawhiti o te ahua mai i te karāhe arotahi. He karāhe arotahi pūkohu te karāhe arotahi, nō reira ka whakamahia te tātai karāhe pūkohu:

1/s _ob ' = 1/f _ob – 1/s _ob = 1/9 – 1/10 = 10/90 – 9/90 = 1/90

s _ob ' = 90/1 = 90 mm

Ka tatauhia te whakanui katoa o te karu hiko ina iti rawa te urunga o te kanohi, ina mutu kore rānei te mutunga o te ahua mā te whakamahi i te tātai:

Te roa o te atarangi = te roa o te mea x te whakanui katoa = (0,5 mm)(45) = 22,5 mirimita.

11. Ko te roa arotahi o te karu hiko he 2,0 cm. Kei raro i te karu hiko tētahi mea i te tawhiti o te 2,2 cm. Ko te roa o te karu hiko he 24,5 cm, ā, kei te mātakitaki te kaimātakitaki me te kore e taunga. Mena he noa ngā kanohi o te kaimātakitaki, ko te whakanui katoa o te karu hiko he…

A. 20 ngā wā

B. 25 ngā wā

C. 50 wā

D. 75 ngā wā

E. 100 ngā wā

Kōrero

E mōhiotia ana:

Te roa o te arotahi o te arotahi arotahi (f _ob ) = 2,0 cm

Te tawhiti o te mea i mua i te arotahi arotahi (s _ob ) = 2,2 cm

Te roa o te karuārai (l) = 24,5 cm

Te pūwāhi tata o te kanohi noa (N) = 25 cm

Te mātakitaki me te kore e noho tahi

Pātai: Te whakanui katoa o te karuārai (M)

Whakautu:

Kāore e tino urutau te kanohi ina tino tawhiti te ahua, e whakaaturia ana i te ahua kei te taha.

Ko te tātai mō te whakanui katoa o te karu hiko ina iti rawa te urunga o te kanohi:

Ngā Mōhiohio:

M = whakanui katoa

l = te roa o te karu hiko = te tawhiti i waenga i te karu arotahi me te karu karu = te roa o te arotahi o te karu arotahi + te tawhiti o te ahua mai i te karu arotahi (s _ob ') = f _ok + s _ob '

Te tawhiti o te ahua mai i te arotahi arotahi (s _ob '):

1/f _ob = 1/s _ob + 1/s _ob '

1/s _ob ' = 1/f _ob – 1/s _ob = 1/2 – 1/2,2 = 2,2/4,4 – 2/4,4 = 0,2/4,4

s _ob ' = 22

Ko te tawhiti o te ahua mai i te karu arotahi he 22 henemita.

Te roa o te arotahi o te karu tirohanga (f _ok ):

l = f _ok + s _ob '

f _ok = l – s _ob ' = 24,5 – 22 = 2,5 cm

Te whakanui katoa o te karuārai (M):

Ko te whakautu tika ko E.

12. I whakahaerehia e tētahi tauira (Sn = 25 cm) tētahi whakamātautau mā te whakamahi i tētahi karuārai, me ngā raraunga e rite ana ki te hoahoa e whai ake nei. Ko te whakanui o te karuārai ko…

A. 30 ngā wā

B. 36 ngā wā

C. 40 wā

D. 46 ngā wā

E. 50 ngā wā

Kōrero

E mōhiotia ana:

Te pūwāhi tata o te kanohi noa (N) = 25 cm

Te tawhiti o te mea (s _ob ) = 1,2 cm

Te roa arotahi whāinga (f _ob ) = 1 cm

Te roa o te arotahi o te karu tirohanga (f _ok ) = 5 cm

Te tawhiti i waenganui i te karāhe arotahi me te karu tirotiro = 10 cm

I pātaihia: Te whakanui i te karuārai

Whakautu:

Ki te mea he tawhiti mutunga kore te ahua whakamutunga, ka iti noa te urunga o te kanohi, engari ki te mea he tawhiti mutunga kore te ahua, ka taea e te kanohi te uru ki te taumata teitei. Ko te ahua whakamutunga o te ahua i runga ake nei e whakaatu ana i tētahi ahua tawhiti mutunga kore kia taea ai e te kanohi te uru ki te taumata teitei.

Ko te tātai mō te whakanui i te karuārai ina tae te kanohi ki te taumata teitei:

Te kōrero mō ngā karu hiko

Ngā karu tirotiro

Kōrero mō ngā karu tirotiro

13. Tirohia te ahua o te ara o te hihi mārama e hanga ana i te ahua i runga i te karu hiko e whai ake nei:
Te tawhiti i waenga i te arotahi arotahi me te arotahi karu kanohi dKo te pūtake o te karu hiko ko….

A. 20 henemita
B. 24 henemita
C. 25 henimita
D. 27 henimita
E. 29 henimita

Kōrero

E mōhiotia ana:
Te tawhiti o te mea mai i te karu arotahi (s_ob) = 2 henemita
Te roa o te arotahi o te karāhe arotahi (f_ob) = 1,8 henemita
Ko te tawhiti o te ahua tūturu mai i te karu arotahi (s_ok) = 6 henemita
Te roa o te arotahi o te karu tirohanga (f_ok) = 6 henemita
Pātai: Te tawhiti i waenga i te karāhe arotahi me te karāhe kanohi (te roa o te ngongo karuārai)
Whakautu:

Mātakihia te ahua i runga ake nei. Ina tae te kanohi ki te taumata iti rawa o te taunga, ko te ahua whakamutunga i hangaia e te karu o te karu kanohi kei te tawhiti mutunga kore. Kia taea ai e te ahua whakamutunga i hangaia e te karu o te karu te tawhiti mutunga kore, me noho te ahua tūturu i hangaia e te karu arotahi ki te pūwāhi arotahi o te karu arotahi. Nō reira, ko te tawhiti i waenganui i te karu arotahi me te karu arotahi (l) = te tawhiti o te ahua tūturu mai i te karu arotahi (s _ob ') + te roa arotahi o te karu arotahi (f _ok ).

Te tawhiti o te ahua tūturu mai i te karu arotahi (s_ob') :
1 / s_ob + 1/h_ob' = 1/w_ob
1 / s_ob' = 1/w_ob – 1/h_ob
1 / s_ob' = 1/1,8 – 1/2
1 / s_ob' = 10/18 – 9/18 = 1/18
s_ob' = 18 henemita

Te tawhiti i waenga i te karāhe arotahi me te karāhe kanohi (te roa o te ngongo karuārai):
l = s_ob' + f_ok
l = 18 henimita + 6 henimita
l = 24 henimita
Ko te whakautu tika ko B.

Pūtake pātai:

Ngā Pātai Ahupūngao Whakamātautau ā-Motu mō te Kura Tuarua/Kura Tuarua Mahi-ā-ringa

Ngā tauira pātai mō ngā taputapu kanohi whatu
Ko te tangata he kanohi noa tōna ka kite tuatahi i tētahi mea e 500 mita te tawhiti. I muri tata iho ka kite te tangata i tētahi mea e 1 mita te tawhiti. Ko te tawhiti i waenganui i te kornea me te retina mata e kiia ana he rite ki te tawhiti o te atarangi, arā, tata ki te 2,5 cm. Tātaihia:
(a) Te roa o te arotahi me te kaha o te karu tirohanga ina arotahi ana ki tētahi mea e 500 mita te tawhiti
(b) Te roa o te arotahi me te kaha o te karu tirohanga ina arotahi ana ki tētahi mea e 1 mita te tawhiti
(c) Ka huri te roa o te arotahi o te karu tirohanga ina huri te arotahi mai i te 500 mita ki te 1 mita.
Kōrero
E mōhiotia ana:
Te tawhiti o te mea 1 (s)₁) = 500 mita = 50.000 henemita
Te tawhiti o te mea 2 (s)₂) = 1 mita = 100 henemita
Te tawhiti atarangi (s') = 2,5 cm
Whakautu:
(a) Te roa o te arotahi me te kaha o te karu arotahi ina arotahi te kanohi ki tētahi mea e 500 mita te tawhiti
Ka tatauhia te roa arotahi (f) o te karu tirohanga mā te whakamahi i tātai arotahi kōpiko :
1/f₁ = 1/s₁ + 1/s' = 1/50.000 + 1/2,5 = 1/50.000 + 20.000/50.000 = 20.001/50.000
f₁ = 50.000/20.001 = 2,499875 henemita
f₁ = 0,02499875 mita
Te kaha o te karaihe kanohi:
P₁ = 1/w₁ = 1/0,02499875 = 40,0 Diopters

(b) Te roa o te arotahi me te kaha o te karu arotahi ina arotahi te kanohi ki tētahi mea e 1 mita te tawhiti
Te roa o te arotahi (f) o te karu tirohanga:
1/f₂ = 1/s₂ + 1/s' = 1/100 + 1/2,5 = 1/100 + 40/100 = 41/100
f₂ = 100/41 = 2,439024 henemita
f₂ = 0,02439024 mita
Te kaha o te karaihe kanohi:
P₂ = 1/w₂ = 1/0,02439024 = 41,0 Diopters

(c) Ka rerekē te roa o te arotahi me te kaha o te karu arotahi ina huri te arotahi mai i te 500 mita ki te 1 mita.
Te huringa o te roa arotahi o te karu arotahi = f₁ - f₂ = 0,02499875 – 0,02439024 = 0,00060851 mita
Te huringa o te kaha o te karu kanohi = 41,0 – 40,0 = 1,0 Ngā Diopters

I runga i te matapakinga o ngā pātai i runga ake nei, ka taea te whakatau ko:
– Ka nui ake te roa o te arotahi o te karu arotahi ina tirohia e te kanohi ngā mea i tawhiti, ā, ka iti ake te roa o te arotahi o te karu arotahi ina tirohia e te kanohi ngā mea i tawhiti.
– Ka nui ake te kaha o te karu tirohanga ina tirohia e te kanohi tētahi mea e tata ana, ā, ka iti iho te kaha o te karu tirohanga ina tirohia e te kanohi tētahi mea e tawhiti ana. Nō reira, ka tata te mea, ka nui ake te kaha o te karu tirohanga.

Ka taea te pānui i tētahi matapakinga whānui ake mō ngā pātai i roto i te tuhinga e pā ana ki ngā tauira pātai mō ngā taputapu kanohi whatu.

He tauira pātai mō ngā mōhiti
Ka taea te pānui i tētahi matapakinga whānui ake mō ngā pātai i roto i te tuhinga e pā ana ki ngā tauira pātai mō ngā mōhiti whatu.

Ngā tauira pātai mō ngā karaihe whakapā
Ka taea te pānui i tētahi matapakinga whānui ake mō ngā pātai i roto i te tuhinga e pā ana ki ngā tauira pātai mō ngā taputapu whatu karāhe whakapā.

He tauira pātai mō te karāhe whakanui, mō te karāhe whakanui rānei
He iti rawa te tuhituhi, kāore e taea te pānui. Ka pānui te tangata i te tuhituhi mā te whakamahi i te karāhe whakanui ina iti rawa te urunga o te kanohi, ko te koki whakanui o te karāhe whakanui he 5x. He aha te roa arotahi o te karāhe whakanui?
Kōrero
E mōhiotia ana:
Te pūwāhi tata o te kanohi noa (N) = 25 cm
Te whakanui i te koki karāhe whakanui (M) = 5 x
I pātaihia: Te roa o te arotahi o te karāhe whakanui (f)
Whakautu:
Ko te tātai mō te whakanui i te koki karāhe whakanui ina tae te kanohi ki te wāhi tino pai:
M = (N/f) + 1
5 = (25 henimita / wh) + 1
5 – 1 = 25 henimita / wh
4 = 25 henimita / wh
f = 25 henimita / 4
f = 6,25 henemita
Ko te roa arotahi o te karāhe whakanui he 6,25 cm. He pai te roa arotahi o te karāhe whakanui nā te mea e whakamahia ana e te karāhe whakanui he karāhe kōpiko ara he arotahi pai.

Ka taea te ako i tētahi matapakinga whānui ake o ngā pātai i roto i te tuhinga e pā ana ki ngā tauira pātai mō ngā karu whakanui, ngā karu whakanui rānei.

Ngā tauira pātai mō te karuārai
Mā te karu tirotiro, ka mātakitaki te tangata he kanohi noa tōna i tētahi mea. Ko te roa arotahi o te karu tirotiro he 20 mm, ā, ko te roa arotahi o te karu tirotiro he 30 mm. Mena kei te 10 cm te tawhiti o te ahua tūturu i puta mai i te karu tirotiro, tatauhia te whakanui koki o te karu tirotiro ina mātakitakihia ki te kanohi i te wā e iti rawa ana te wāhi e noho tahi ai.
Kōrero
E mōhiotia ana:
Te roa o te arotahi o te karāhe arotahi (f_ob) = 20 mm
Te roa o te arotahi o te karu tirohanga (f_ok) = 30 mm
Te tawhiti o te (ngā) whakaahua arotahi arotahi_ob') = 10 henimita = 100 mm
Te tawhiti tata o te kanohi noa (N) = 25 cm = 250 mm
I pātaihia: Ko te whakanui koki o te karu hiko ina tirohia ki te kanohi i te wāhi iti rawa e hiahiatia ana
Whakautu:
Te tātai whakanui koki katoa o te karu hiko ina uru te kanohi ki te iti rawa:

Ko te whakanui koki katoa (M) o te karu hiko ina noho te kanohi i te taumata iti rawa he 42,0 x pea.

Ka taea te pānui i tētahi matapakinga whānui ake mō ngā pātai i roto i te tuhinga e pā ana ki ngā tauira o ngā pātai mō te karuārai mārama.

He tauira pātai mō te karu whetū
Ka taea te ako i tētahi matapakinga whānui ake mō ngā pātai i roto i te tuhinga e pā ana ki ngā tauira pātai mō ngā karu whetū.

Ngā tauira pātai mō ngā taputapu whatu kāmera
Ka taea te pānui i tētahi atu kōrero mō ngā pātai i roto i te tuhinga e pā ana ki ngā tauira pātai mō ngā taputapu whatu kāmera.