Understanding Entropy: What Is It?

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What exactly is entropy?
 
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Thread 'Can somebody explain this: Planck's Law in action'

Thread 'Can somebody explain this: Planck's Law in action'

Plotted is the Irradiance over Wavelength. Please check for logarithmic scaling. As you can see, there are 4 curves. Blue AM 0 as measured yellow Planck for 5777 K green Planck for, 5777 K after free space expansion red Planck for 1.000.000 K To me the idea of a gamma-Ray-source on earth, below the magnetic field, which protects life on earth from solar radiation, in an intensity, which is way way way outer hand, makes no sense to me. If they really get these high temperatures realized in...
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