What is probability density?


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Louise Zhuang
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Joined: Fri Sep 28, 2018 12:28 am

What is probability density?

Postby Louise Zhuang » Sun Oct 21, 2018 11:04 pm

Why is the square of the wavefunction(psi) the probability density? What is it exactly? (I read the textbook but it doesn't make a lot of sense to me...)

Laura Gong 3H
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Re: What is probability density?

Postby Laura Gong 3H » Mon Oct 22, 2018 2:19 pm

The probability density is a measure of the likelihood (probability) that a particle will be found at a particular location in space. In this case, where you would likely find an electron in the electron cloud.

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Re: What is probability density?

Postby deepto_mizan1H » Tue Oct 23, 2018 8:33 pm

There is a slight difference between psi and psi^2, which helps to understand Schrodinger's Equation conceptually. Psi itself is a wavefunction, which varies with position. Once we square this value it becomes only positive, and provides a dimensional model of the area we can probabilistically find an electron. Therefore psi^2 is probability density for a particle, most often an electron.

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