- #1
tigigi
- 38
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I got the answer of the hw, but still have question about it.
I need to calculate the scattering time μ = eτ / m. τ is the mean time.
the unit needs to be in cm^2 / V.S
I put the unit like this :
e = coulumb
τ = s
m = kg
then it's impossible to get the unit like that.
Then I'm wondering if I could use this to find τ and plug it in :
σ = ne^2 τ / m then
μ = σ / ne , but I got a problem that it's still not possible to solve it since we don't know the material then don't know σ.
Who could tell me what's going here. I appreciate it.
I need to calculate the scattering time μ = eτ / m. τ is the mean time.
the unit needs to be in cm^2 / V.S
I put the unit like this :
e = coulumb
τ = s
m = kg
then it's impossible to get the unit like that.
Then I'm wondering if I could use this to find τ and plug it in :
σ = ne^2 τ / m then
μ = σ / ne , but I got a problem that it's still not possible to solve it since we don't know the material then don't know σ.
Who could tell me what's going here. I appreciate it.