Collision frequency, in physics, often refers to the rate at which particles collide within a system, such as in gases or plasmas. The collision frequency depends on various factors such as the density of particles, their velocities, and the cross-sectional area of interaction.
The collision frequency, denoted by , can be calculated for a gas using the following formula:
Where:
- is the collision frequency in hertz (Hz),
- : particles per cubic meter (m−3),
- : square meters (m),
- : meters per second (m/s).
Once you have these values, simply multiply them together to get the collision frequency with the appropriate SI units.