Plotting Fresnel reflection plotting

Hi,

I'm new to MATLAB and I tried plotting the formula for the fresnel reflection:

R=(n_S-1)^2/(n_S+1)^2.

Here's what I did:

n_S = 1:.1:3.5;
R=((n_S-1).^2)/((n_S+1).^2);

Unfortunately that gave me a number as answer (0.2235) and not the 26-Element Array I was expecting. I also tried calculating both the upper and lower part of the quotient separately. Both gave me an Array, but when I calculated R=R_upper/R_lower I still got 0.2235.

Can anyone please tell me, what I am doing wrong?

Thanks in advance for your help.

Answer 1

[Ben Southwell]

If anyone needs to know the answer to this. It is because he is not doing element wise division

R=((n_S-1).^2)/((n_S+1).^2);

should be

R=((n_S-1).^2)./((n_S+1).^2);

Note the './' instead of '/' for division