Derive the Planck radiation law emitted by a blackbody. Remember that light has two directions of polarization and treat the waves as an ensemble of harmonic oscillators.

X-rays with a wavelength of 1.16 Å scatter at an angle of 24.5 ∘ from a crystal. If n=1 , what is the distance between planes of atoms in the crystal that give rise to this scattering? Express your answer with the appropriate units.

Which of the following is true regarding the Rayleigh Jeans law? (select all that apply) O It is based on classical thermodynamics O It is based on quantum physics O The predictions for the spectral emission of light (intensity as a function of temperature and wavelength) matched with experimental data for small wavelengths (high frequency) O The predictions for the spectral emission of light (intensity as a fucntion of temperature and wavelength) matched with experimental data for large wavelengths (low frequency)

Consider a proton, an electron, and a helium nucleus (alpha particle) moving at the same speed v. List their de Broglie wavelengths from largest to smallest.