function plotit_30

b = 30;
n1 = 1.3;
input = 0;
n2 = 1.1:0.01:1.5;
s = size(n2);
a1 = [0 30 45];
for i = 1:3,
	for t = 1:s(2),
		r(t) = n2(t);
		d(t,i) = deviation(input,a1(i),a1(i),b,n1,n2(t));
	end;
end;
plot(r,d)
line([1.1 1.5],[0 0],'LineStyle','-.');
line([1.3 1.3],[-20 20],'LineStyle','-.');
text(1.12,27,'First tapered plate index of refraction = 1.30',...
	'FontSize',10,'FontWeight','demi');
text(1.12,25,'Interface angle = 30 degrees',...
	'FontSize',10,'FontWeight','demi');
text(1.31,-5,'---- Both block angles = 0 degrees','color','b',...
	'FontSize',10);
text(1.31,-7.5,'---- Both block angles = 30 degrees','color',[0 .6 0],...
	'FontSize',10);
text(1.31,-10,'---- Both block angles = 45 degrees','color','r',...
	'FontSize',10);
xlabel('Second tapered plate index of refraction','color','b',...
	'FontSize',12,'FontWeight','demi');
ylabel('Angular deviation from horizontal','color','b',...
	'FontSize',12,'FontWeight','demi');
title('Angular Deviation Provided by "Light Guiding Device"','color','r',...
	'FontSize',14,'FontWeight','demi');