wavelength_incidence=2700;
grating_frequency=500;
angle_incidence=42.5;
diffracted_order_1=1;
diffracted_order_0=0;


grating_period=1/grating_frequency*10^-3;
wavelength_incidence=wavelength_incidence*10^-9;
diffracted_angle_1=（asin（wavelength_incidence*diffracted_order_1/grating_period-sin（angle_incidence*pi/180）））/pi*180;
diffracted_angle_0=（asin（wavelength_incidence*diffracted_order_0/grating_period-sin（angle_incidence*pi/180）））/pi*180;

A=0:0.1:1;
x_diffracted_1=A*sin（diffracted_angle_1/180*pi）;
y_diffracted_1=A*cos（diffracted_angle_1/180*pi）;
plot（x_diffracted_1y_diffracted_1‘g‘‘linewidth‘3）
hold?on
x_diffracted_0=A*sin（diffracted