Litheleskoupo tsa lisebelisoa tsa optical - mathata le litharollo

1. Bolelele ba ntlha e ka sehloohong ya lense ya mahlo ke 400 cm mme bolelele ba ntlha e ka sehloohong ya lense ya mahlo ke 20 cm. Haeba leihlo le phutholohile, fumana:

a) Kgodiso ka kakaretso ya telesekoupu (M)

b) sebaka sa setšoantšo ho tloha lenseng ea sepheo ( d _ob '),

c) _sebaka sa setšoantšo ho tloha lenseng ea mahlo ( doc ₎

d) sebaka se pakeng tsa lilense

Tse tsejoang:

Bolelele ba ntlha bo shebaneng le lense ya sepheo (f _ob ) = 400 cm

Bolelele ba focal ba lense ea mahlo ( fo _{c )} = 20 cm

Leihlo le phutholohile e le hore setšoantšo sa 'nete se hlahisoang ke lense ea sepheo se be ntlheng ea mantlha ea lense ea sepheo le ntlha ea pele ea mantlha ea lense ea mahlo.

Tharollo:

a) Kgodiso ka kakaretso (M)

M = f _ob / _{fo c}

M = 400 cm / 20 cm = 20 X

Setšoantšo se entsoe ka mokhoa oa sebele 'me se khelohile.

b) Sebaka sa setšoantšo ho tloha lenseng e shebaneng le sepheo ( d _ob ')

Haeba leihlo le phutholohile, sebaka sa setšoantšo ho tloha lenseng e shebileng ( d _ob ') = bolelele ba focal ba lense e shebileng ( f _ob ) = 400 cm = 4 m.

c) Sebaka sa setšoantšo sa 'nete ho tloha lenseng ea _mahlo ( doc ₎

Haeba leihlo le phutholohile, sebaka sa setšoantšo sa 'nete le lense ea mahlo (s _{o c} ) = bolelele ba focal ba lense ea mahlo (f _oc ) = 20 cm = 0.2 m.

d) Sebaka se pakeng tsa lilense

Sebaka se pakeng tsa lilense = bolelele ba teleskoupo (l) = bolelele ba focal ba lense e shebaneng le sepheo (f _ob ) + bolelele ba focal ba lense ea mahlo (f _oc ) = 400 cm + 20 cm = 420 cm.

2. Sebaka se pakeng tsa lense e shebaneng le mahlo le lense ke 20 cm . Ka kakaretso, kgolo ya teleskopu ha leihlo le phutholohile ke 40X. Bala bolelele ba lense e shebaneng le mahlo (fo _{c )} le bolelele ba lense e shebaneng le mahlo (f _ob )

Tse tsejoang:

bolelele ba teleskoupo (l) = 20 cm

kgolo ka kakaretso ya teleskopu (M) = 40

Tharollo:

Haeba leihlo le phutholohile, bolelele ba lense ya mahlo (f _oc ) + bolelele ba lense ya sepheo (f _ob ) = bolelele ba teleskopu (l)

fo _{o c} + f _ob = l

f _ob = l – fo _{o c}

f _ob = 20 – fo _{c —–} > equation 1

Kgodiso ka kakaretso ya telesekoupo (M):

M = f _ob / _{fo c}

f _ob = M _{fo c}

f _ob = 40 fo _{c —–} > equation 2

Bolelele ba lense ea mahlo :

Kenya f _{ob ho} equation ya 1 ka f _{ob ho} equation ya 2:

f _ob = 20 – fo _{o c}

40 fo _{c =} 20 – _{fo c}

40 fo _{c +} fo _{c =} 20

41 fo _{c =} 20

fo _{c =} 20 cm / 41

fo _{o c} = 0.5 cm

Bolelele ba ntlha ya lense ya mahlo = 0.5 cm.

Bolelele ba ntlha bo shebaneng le lense ya sepheo :

f _ob = 20 – f _oc

f _ob = 20 – 0.5

f _ob = 19.5 cm

[ID ea sephutheloana sa wpdm='876′]

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