- #1

PBJ

- 1

- 0

The peak wavelengths are at [tex]\lambda_{10}[/tex],[tex]\lambda_{11}[/tex],[tex]\lambda_{20}[/tex]

(i.e. where [tex](i^{2}+j^{2})[/tex] terms are

[tex]1^{2}+0^{2}=1[/tex]

[tex]1^{2}+1^{2}=2[/tex]

[tex]2^{2}+0^{2}=4[/tex]

I don't understand what is meant by "i,j correspond to the orders of the 2D wave vector" and why the notation goes up as 10,11,20...

I expect there is a simple explanation if someone would be kind enough to help me understand this.