Teropong bintang perbesaran angularnya 10 kali. Jika jarak objektifnya 50 cm maka panjang teropong adalah....
tolong pakai cara ya
tolong pakai cara ya
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M = 10 kali
fob = 50 cm
ditanyakan :
d = ?
jawab :
M = fob/fok
10 = 50/fok
fok = 5 cm
d = fob + fok
d = 50 + 5
d = 55 cm