谁计算nb帮算下..
1.
X1+Y1=90du
n1=1.00
n2=1.33
n1sin(X1)=n2sin(X2)
n1sin(Y)=n2sin(90-Y)=n2cos(Y)
Y=arctan(n2/n1)
2.
n1=1.33
n2=1.00