bantu jawab dong kak
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Jawaban:
-15cm
Penjelasan:
diket :
f = 20cm
S = 30cm
ditanya : Si...?
menentukan jarak bayangan rumus nya :
[tex] \frac{1}{si} = \frac{1}{f} - \frac{1}{s} [/tex]
dengan :
f = Jarak fokus
s = jarak benda(objek)
si = jarak bayangan
maka :
[tex] \frac{1}{si} = \frac{1}{ - 20} - \frac{1}{30} = \frac{ - 3 - 1}{60} = \frac{ - 4}{60} = \frac{ - 1}{15} = - 15cm[/tex]
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