Freethought & Rationalism Archive

Answerer · 07-25-2002, 08:07 PM

Hello, everyone...
I've got a question that been bugging me.
How are the quantities Planck mass, length, time and energy derived?

Friar Bellows · 07-25-2002, 11:22 PM

Quote:

Originally posted by Answerer:
<strong>Hello, everyone...
I've got a question that been bugging me.
How are the quantities Planck mass, length, time and energy derived?</strong>

<a href="http://nedwww.ipac.caltech.edu/level5/Glossary/Essay_plancklt.html" target="_blank">Here's</a> a hand-waving derivation of it (a very rough estimate), using the uncertainty principle, and the free-fall collapse time of a self-gravitating body. Not a rigorous derivation by any means.

Answerer · 07-26-2002, 09:36 PM

Well, thanks for your help.

07-25-2002, 08:07 PM	#1
Answerer Veteran Member Join Date: Feb 2002 Location: Singapore Posts: 3,956	Derivation of planck length, time,mass and energy Hello, everyone... I've got a question that been bugging me. How are the quantities Planck mass, length, time and energy derived?

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07-26-2002, 09:36 PM	#3
Answerer Veteran Member Join Date: Feb 2002 Location: Singapore Posts: 3,956	Well, thanks for your help.

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