October 2018 2 16 Report
Diketahui cepat rambat cahaya di udara 3 x 10pangkat8 m/s dan celat rambat cahaya pada kaca 2,25 x 10pngkat8 m/s. i deks bias kaca tersebut adalah..
a.4/3 b.5/3 c.2 d7/3

tolong bantu ya chinggu..

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