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Pob = 25/18
Pok = 25 D
Ditanyakan : d dan M ?
Dijawab :
fokus objektif :
fob = 100/P
= 100 / 25/18
= 100x18 / 25
= 72 cm
Fokus okuler :
fok = 100/Pok
= 100/25
= 4 cm
a. Panjang :
d = fob + fok
= 72 + 4
= 76 cm
b. Perbesaran :
M = fob/fok
= 72/4
= 18 D