Are These Expressions for Probability Current Density Equivalent?

[qwijiboo]

Hi folks!

Can someone tell me how to solve the following... I'd really appreciate it.

Homework Statement

Show that the below two expressions for probability current density are equivalent.

j(r,t) = h'/2im(\Psi^{*}\Delta\Psi- (\Delta\Psi^{*})\Psi]

j(r,t) = real part of [\Psi^{*} (h'/im) \Delta\Psi]

Homework Equations

h' is the reduced Plancks constant h/2pi

The Attempt at a Solution

 

[Dick]

You should really give us your thoughts (or at least a guess) on this. But if c is a complex number, what's the relation between Im(c) and Re(c/i)? And you may also want to think about integration by parts.

 

[qwijiboo]

I'm sorry... but I figured it out. Its a pure math problem. Sometimes my brain just ceases to work!

RP of the second equation is {j(r,t) + [j(r,t)]*}/2 substituting ,we get the first equation.

Thanks anyways for replying to my post.