Photon Gas

Max Planck

Aaah! Natural Light! Get of off me, get it off me!

Barney Gumble


The ideal classical particle gas is sometimes too simple. The independence of the internal energy on the volume often leads to confusion when discussing more realistic processes. In particular the idea that the specific heat at constant volume can depend on the volume for almost everything but an ideal classical particle gas is a source of endless head-scratching for the average student. Therefore it is useful to introduce a second system, slightly less simple, but for which nevertheless all properties are still amenable to easy exact analysis [1]. Read more

Thermodynamica Onderwijzen


Geheel in de geest van mijn voorganger in deze zal ik beginnen met een anekdote:

Then Jesus took His disciples up the mountain and gathered them around Him. He taught them saying: ”Blessed are the poor in spirit for theirs is the kingdom of heaven. Blessed are the meek. Blessed are they that mourn. Blessed are they who thirst after righteousness. Blessed are they who are persecuted. Blessed are they who suffer. Be glad and rejoice for your reward is great in heaven. Remember what I am telling you.” Read more

About Thermodynamics

I might as well try to explain the laws of thermodynamics to a bunch of labradoodles.

Sheldon Cooper



In his lecture The Two Cultures, C.P. Snow, an English physicist and novelist, laments:

A good many times I have been present at gatherings of people who, by the standards of the traditional culture, are thought highly educated and who have with considerable gusto been expressing their incredulity at the illiteracy of scientists. Once or twice I have been provoked and have asked the company how many of them could describe the Second Law of Thermodynamics, the law of entropy. The response was cold; it was also negative. Yet I was asking something which is about the scientific equivalent of: “Have you read a work of Shakespeare’s?”
I now believe that if I had asked an even simpler question – such as, “What do you mean by mass, or acceleration?”, which is the scientific equivalent of saying, “Can you read?” – not more than one in ten of the highly educated would have felt that I was speaking the same language. So the great edifice of modern physics goes up, and the majority of the cleverest people in the western world have about as much insight into it as their Neolithic ancestors would have had.

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