User talk:Kalatash

Planck's Law
$$E = hf = h \frac{c}{\lambda}$$

Photo Electric Effect
$$hf = hf_0 + {1 \over 2}{m}{v_m}^2 = \phi + E_k\ $$


 * h is Planck's constant;
 * f is the frequency of the incident photon;
 * f0 is the threshold frequency for the photoelectric effect to occur;
 * $$\phi$$ is the work function, or minimum energy required to remove an electron from atomic binding, and
 * $$E_k$$ is the maximum kinetic energy observed.

Pair Production
$$ hf = K_e^- + K_e^+ + 2 m_e c^2 $$

Compton Scattering
$$ \Delta\lambda = \frac{h}{m_e c}(1-\cos{\theta}) $$


 * me is the electron mass and h/(mec) is known as the "Compton wavelength".
 * θ is the angle by which the photon's heading changes.
 * me, electron mass, is 9.109 x 10-31 kilogram.
 * h, the energy associated with photons, is 6.63×10-34 joule-second or 4.14×10-15 electronvolt-second.
 * c, the speed of light, is 3×108 meters per second.

Cross Sections
$$I(t) = I(0) e^{-\sigma pt} $$


 * $$\sigma$$ is the cross section.
 * $$p$$ is the atoms per area.