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emptymalei opened this issue · comments
LM commented
Quantities
- Fine structure constant:
$$\alpha = \frac{k_e e^2}{\hbar c} \propto e^2$$ . - Bohr radius:
$$a_0 = \frac{\hbar}{m_e c \alpha} $$ . - Parallel capacitors:
1.
Important Processes
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Compton scattering:
- The change in the wavelength of the electron is related to the de Broglie wavelength of the electron,
$\lambda_e = \frac{h}{m_e c}$ . - Zero scattering angle means no change in wavelength, since no recoil happens.
- Bouncing back gives the max change in wavelength of photons.
- The relation is
$\lambda'-\lambda = \lambda_e (1 - \cos \theta)$ , where$\theta$ is the scattering angle between photon incoming momentum and the outgoing momentum.
- The change in the wavelength of the electron is related to the de Broglie wavelength of the electron,
Some Concepts
- Semiconductors
- n-type: more electrons
- p-type: more hole concentrations