Rumus:
P = 100/ f
P = kuat lensa (D)
f = fokus lensa (cm)
M teropong panggung= |fob/fok|
M = perbesaran
fob = fokus lensa objektif
fok = fokus lensa okuler
d = fob + fok
d= panjang teropong
diketahui:
M = 40
P ob = 0,5 D
jawab:
P ob= 100/ f ob
fob = 100/ P ob = 100/ 0,5 = 200 cm
40 =| fob/fok| = 200/ fok
fok = 200/40 = 5 cm
d = 200 + 5 = 205 cm
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205 cm
Rumus:
P = 100/ f
P = kuat lensa (D)
f = fokus lensa (cm)
M teropong panggung= |fob/fok|
M = perbesaran
fob = fokus lensa objektif
fok = fokus lensa okuler
d = fob + fok
d= panjang teropong
diketahui:
M = 40
P ob = 0,5 D
jawab:
P ob= 100/ f ob
fob = 100/ P ob = 100/ 0,5 = 200 cm
M teropong panggung= |fob/fok|
40 =| fob/fok| = 200/ fok
fok = 200/40 = 5 cm
d = fob + fok
d = 200 + 5 = 205 cm