October 2018 2 107 Report
Cahaya merambat dari udara ke air. Bola kecepatan cahaya dalam air adalah 2 1/4 × 10 pangkat 8 ms pangkat -1, maka Indeks bias air sama dengan...
a. 4/3
b. 3/2
c. 3/4
d. 2/3

pake jalannya ya..
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