Chem 202 - Webtext 2.6
Order by
9 terms
Chemistry | Math / Symbols |
|---|---|
 Albert Einstein's equation relating mass and energy | E² = m²c⁴ + p²c² The equation is so often turned into E=mc² because for a massed particle, the momentum is so small that the p²c² term is negligible. |
| Photons | Light energy comes in small packets of well-defined energy called photons. |
| Photons vs. Electrons | Photons are electrically neutral, have no mass, and have a spin of 1, not ½. |
| Photons and the Pauli exclusion principle | Photons do not obey the Pauli exclusion principle; they are gregarious particles. |
| Energy for a free particle | Energy = mass-energy + kinetic energy. For a non-free particle, add the potential energy (i.e. the p²c² term). |
| Energy of a photon | A photon is massless, so its energy is given by E = pc |
| p = h / λ | A Fourier principle that holds as a special case for freely moving particles such as photons or electrons not stuck in a box; hence, the wavelength of the particle replaces the length of the box. |
| Waves and quantum particles | The Heisenberg priciple, with its Fourier-conjugate relationship between momentum and distance, imparts on quantum particles properties usually reserved for waves. |
| Planck's Law | E = hν The energy of a photon is linearly proportional to its frequency. |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.