Question

Va rog ajutati.ma si pe mine la fizica este super urgent ​

Answer 1

$nsini=n_1sinr<=>1*sin60^o=n_1sin45^o<=>\frac{\sqrt{3} }{2} =n_1\frac{\sqrt{2} }{2} |:\frac{2}{\sqrt{2} } =>n_1=\frac{\sqrt{3} }{\sqrt{2} }=\sqrt{\frac{3}{2} }=\sqrt{1,5}=1,225=>n_1=1,225$