Hi everyone! I'm a psychologist form Brazil, so sorry for the bad English and for the lack of knowledge in math!(adsbygoogle = window.adsbygoogle || []).push({});

I ve been trying to understand the Schrodinger equation and, as predicted, it's very hard!

Please, help me with this:

A sine wave function can be written as:

F (x) = sin (x)

And that can be represented as psi.

The the derivative of that function can be written as:

F (x) = cos (x)

And that can be represented as psi dot.

Also, the derivative of psi dot can be written as:

F (x) = - sin (x)

And thats psi with two dots.

So far I understood!

But things get confusing here:

A wave equation can be written as:

F (x) = A sin (2π f x )

Where A stands for the amplitude, 2π f x stands for the period.

But, in this video:

It is stated, at 8 mins, that the correct wave function is, as expected:

F (x)= sin (2π f t)

And that's represented by psi

But the derivative of that is

F (x) = 2π f cos (2π f t)

And not

F (x) = cos (2π f t)

(And that's represented by psi dot)

To make things worst, the derivative of that last equation, psi dot, is represented by

## f (x) = - (2π f)^2 sin (2π f t) ##

And not just

F (x) = - sin (2π f t)

(And that's represented by psi with 2 dots)

Why is that?

Thanks a lot!

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# B Wave equation, psi with dots and things like that...

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