quantum mechanics - Differences between wavefunction, probability and probability density?

Wednesday, December 6, 2017

quantum mechanics - Differences between wavefunction, probability and probability density?

I am trying to understand the differences between wavefunction, probability and probability density. There are different definitions on the internet.

For example:

enter image description here http://inside.mines.edu/~fsarazin/phgn310/PDFs/QuantumLect4.pdf

and

enter image description here http://depts.washington.edu/chemcrs/bulkdisk/chem455A_aut05/hw_ans_nopass_wk%2004%20KEY.pdf

My questions are:

Which one is true?

What is the difference between three of them(wavefunction, probability and probability density)?

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