Jawabanmu

2014-05-27T15:37:05+07:00
 n_{1} sin θ1 =  n_{2} sin θ2
1 sin 45° =  n_{2} sin 30°
1 x 1/2 \sqrt{2} n2 x 1/2
 \frac{1/2 \sqrt{2} }{1/2} n2
1/2 \sqrt{2} x 2/1 =n2
 \sqrt{2} n2