Calculate wavelength of electron

[okgo]

Homework Statement

http://www.screencast.com/users/trinhn812/folders/Jing/media/9582a1aa-b21a-4e50-8774-b60866a7d666

Homework Equations

lambda=h/p

The Attempt at a Solution

So I got 4.04E-12 m but the book says the answer is 3.23pm

I'm not sure where I'm wrong

 

[rock.freak667]

The speed of the electron is 0.6c, so you need to to use

λ=h/γp where γ = 1/√(1-(v/c)²)

 

[okgo]

Thanks. So in addition to time dilation and length contraction, is this what you call momentum dilation?

 

[rock.freak667]

Thanks. So in addition to time dilation and length contraction, is this what you call momentum dilation?

Not sure if that is what it is called, but I call it momentum accounting for relativistic effects.