- The particle behavior of light is proven by the photoelectric effect.
- A photon is a particle of light {wave packet}.
- Large objects have very short wavelengths when moving and thus can not be observed behaving as a wave. (DeBroglie Waves)
- All electromagnetic waves originate from accelerating charged particles.
- The frequency of a light wave determines its energy (E = hf).
- The lowest energy state of a atom is called the ground state.
- Increasing light frequency increases the kinetic energy of the emitted photo-electrons.
- As the threshold frequency increase for a photo-cell (photo emissive material) the work function also increases.
- Increasing light intensity increases the number of emitted photo-electrons but not their KE.
Modern Physics Facts
Modern Physics Facts