Simple question How to calculate the mean free path

In summary, the mean free path is the average distance a particle travels between collisions in a gas or liquid. It can be calculated using the formula (total volume / total number of particles) * cross-sectional area and is affected by factors such as density, temperature, and particle size. The mean free path is closely related to diffusion and can be used to predict the behavior of gases and liquids, although it only represents an average and does not account for individual particle behavior.
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IN88
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Hi,

I am wondering how i can calculate the classical mean free path of electrons in InSb given the following material parameters...

zero field conductivity = 1.86e4 1/ohm m
electron mobility = 45,500 cm^2/Vs

Is it a case of working out the scattering time and multiplying it by the fermi velocity? If so how do i go about this?

Thanks
 
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Related to Simple question How to calculate the mean free path

1. What is the mean free path?

The mean free path is the average distance a particle travels between collisions in a gas or liquid. It is a measure of the average distance a particle can travel before it collides with another particle or surface.

2. How do you calculate the mean free path?

The mean free path can be calculated using the formula: mean free path = (total volume / total number of particles) * cross-sectional area. This formula takes into account the density of the gas or liquid, the number of particles, and the average distance between collisions.

3. What factors can affect the mean free path?

The mean free path can be affected by several factors, including the density and temperature of the gas or liquid, the size and shape of the particles, and the presence of any external forces or fields. These factors can alter the speed and direction of the particles, thus impacting their average distance between collisions.

4. How is the mean free path related to diffusion?

The mean free path is closely related to diffusion, as it is a measure of the average distance a particle can travel before colliding with another particle or surface. In diffusion, particles move from an area of high concentration to an area of low concentration, and their mean free path determines the rate at which this movement occurs.

5. Can the mean free path be used to predict the behavior of gases or liquids?

Yes, the mean free path can be used to make predictions about the behavior of gases and liquids. By understanding the average distance between collisions, scientists can better understand and predict the diffusion, thermal conductivity, and other properties of these substances. However, it is important to note that the mean free path is an average and does not account for individual particle behavior.

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