1 / 16

3 - Light

3 - Light. The Wave Nature of Light. Wavelength  - Units: meters (m),  m, nm Frequency  or f - Unit: cycles/s, universally called Hertz (1 Hertz = 1 cycle/s)

alma
Télécharger la présentation

3 - Light

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 3 - Light

  2. The Wave Nature of Light Wavelength - Units: meters (m), m, nm Frequency or f - Unit: cycles/s, universally called Hertz (1 Hertz = 1 cycle/s) Speed - Units: m/s NOTE: v = f  Usually denoted by “c”, in a vacuum (such as interstellar space) it is the same for all wavelengths.

  3. The Electromagnetic Spectrum

  4. Polarized Light

  5. Blackbody Radiation

  6. Blackbody spectrum depends on Temperature - which temperature to use? - Fahrenheit, Celsius, or Kelvin? 0 100 F ice-alcohol mix human body C water freezes water boils (sea level!) K motion stops (same scale as C)

  7. Laws of Blackbody Radiation Wien's Law Wilhelm Wien, in 1893

  8. Wien's Law - Example

  9. Stefan-Boltzmann Law - 1878-1884 Josef Stefan and Ludwig Boltzmann

  10. Stefan-Boltzmann Law

  11. Continuum & Lines Real stars usually have a blackbody-like continuous spectrum, upon which absorption lines are superimposed

  12. Photon-Atom Interactions

  13. Molecular Spectra Rotational Vibrational Electronic

  14. Earth’s Atmosphere

  15. Inverse-square Law of Light

  16. Doppler Effect

More Related