1 / 12

Understanding Light Waves in Radiation Physics

Explore light waves as electromagnetic energy and their properties, including frequency, wavelength, and blackbody radiation. Learn about the greenhouse effect and how moving electric charges are the source for all electromagnetic waves.

megan-cabrera
Download Presentation

Understanding Light Waves in Radiation Physics

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. Radiation – Electromagnetic Energy PHY 299 Spring 2009 Bob Brecha

  2. Light Waves Light is a form of wave, like a water wave or a wave on a rope. But ... waves need something to “wave” (e.g. water or rope or a crowd) Light (electromagnetic) waves can also move through vacuum.

  3. What are Light Waves ? Light waves are really made up of electric fields and magnetic fields - more on that later Moving electric charges are the source for all electromagnetic waves.

  4. What are Waves ?

  5. What are Waves?

  6. Wave Properties The period of a wave is related to the wavelength of the wave. It is sometimes easier to talk about the “frequency” of the wave rather than the period f = 1/T c = f × l c = speed of light (300,000 km/sec.)

  7. Blackbody Radiation

  8. Blackbody Radiation Low temperatures Long wavelength radiation 40ºC  10,000 nm peak (10 mm) High temperatures  Shorter wavelength radiation 6000 ºC  500 nm peak (0.5 mm)

  9. Blackbody Radiation

  10. Blackbody Radiation

  11. Greenhouse Effect

  12. Greenhouse Effect

More Related