Physics Help Forum Probabiltiy density rho(k,t) of k at time t?

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Feb 28th 2015, 04:17 PM   #1
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Probabiltiy density rho(k,t) of k at time t?

A free 1-D particle has initial wave function psi(x)=A exp(-x^2/4a^2)

What is the probability density rho(k,t) that a wavevector measurement at time t will measure k?

Please see attachment. I am confused on how to find the probability density of the time dependent wavefunction.