Interference Applications From CDs to Holograms Quick Review

Interference Applications From CD’s to Holograms

Quick Review So far, we have learned about: • Double slit interference • Single Slit Interference • Multiple slit Interference (Diffraction gratings) • Thin film interference Now, lets put it all together!

CD’s and DVD’s: How do they work? CD’s and DVD’s are a very good example of Thin film interference and diffraction gratings in action. But how exactly do they work?

Basics behind a CD and DVD

Basics of a CD and DVD cont’d

Holograms: 3 -D out from 2 -D So far, most of us have seen a hologram somewhere. However, how exactly do those images get generated?

Basics of a how a hologram is created

EM Waves Presentation Tuesday May 26 th, 2009 Purpose: to introduce you to EM waves in general. Presentation: To present on a specific EM wave, and discuss careers, applications, and social impacts Choices are: Gamma rays, Microwaves, Visible light, X-rays, and Infrared

Careers and Social Impacts This part of your presentation encourages you to learn more about the real world applications of all the physics you have been learning about, and the impacts it has on our society as a whole. Lets consider an example to get you oriented