- #1
yungman
- 5,723
- 242
Laplace equation:
[tex]\frac{R''}{R} + \frac{1}{r}\frac{R'}{R} + \frac{1}{r^2}\frac{\Theta''}{\Theta} =0 [/tex]
Which give:
[tex]r^2\frac{R''}{R} + r\frac{R'}{R} - \lambda R =0 \;and\; \Theta '' + \lambda \Theta =0 [/tex]
[tex]\theta \;is\; 2\pi \;periodic\; \Rightarrow\; \Theta \;is\; 2\pi \;periodic\;[/tex]
My question is: Why then [tex]\theta \;is\; 2\pi \;periodic\; \Rightarrow\;\lambda = n^2[/tex] where n= 0,1,2,3...
AND
[tex] \Theta = a_n cos(n\theta) + b_n sin(n\theta)[/tex]
[tex]\frac{R''}{R} + \frac{1}{r}\frac{R'}{R} + \frac{1}{r^2}\frac{\Theta''}{\Theta} =0 [/tex]
Which give:
[tex]r^2\frac{R''}{R} + r\frac{R'}{R} - \lambda R =0 \;and\; \Theta '' + \lambda \Theta =0 [/tex]
[tex]\theta \;is\; 2\pi \;periodic\; \Rightarrow\; \Theta \;is\; 2\pi \;periodic\;[/tex]
My question is: Why then [tex]\theta \;is\; 2\pi \;periodic\; \Rightarrow\;\lambda = n^2[/tex] where n= 0,1,2,3...
AND
[tex] \Theta = a_n cos(n\theta) + b_n sin(n\theta)[/tex]