## Wednesday, November 19, 2014

### a quantum of sunshine

the Planck-spectrum is dominated by Boltzmann-statistics at high energies and by Bose-statistics at low energies. could you estimate how much solar power we receive per unit area at Earth from the quantum-mechanical part of the Sun's spectrum?

#### 1 comment:

1. the thermal wavelength of the photons gives a limit where the Planck-spectrum gets approximated by classical Boltzmann-statistics. integrating over the low-energy, quantum mechanical part of the Planck-spectrum up to the thermal wavelength gives a fraction of roughly 40%.