2. This is a bug! These are water ripples

4. DO NOW: HW WORKBOOK AND SIDE BENCH WITH YOUR NAME STICK! ESSENTIAL QUESTION: What are some of the consequences and/or applications of the Doppler Effect? HOMEWORK: Read and make NOTES on 2pt Interference patterns and Young’s Equation

8. Sound Barrier

9. Moving closer: Moving apart:

10. http://lectureonline.cl.msu.edu/~mmp/applist/doppler/d.htm

11. The Speed of Sound and Beyond! V sound = 332 + 0.6T where T is temperature in Celsius

13. Remember this?

14. What about light? If light is a wave, then light should show Doppler effects too!

15. The spectral lines in light from distant galaxies were shifted towards the red end of the spectrum. 1923 Edwin Hubble concluded that this shift was caused by the Doppler Effect which indicated that distant galaxies are moving away from the earth at high speeds. The farther away the galaxy, the higher its speed. Redshift of spectral lines in the supercluster of distant galaxies (right), as compared with that of the Sun (left). Wavelength increases up towards the red and beyond (frequency decreases).

16. But not just light …. - all electromagnetic radiation Doppler shifts! Doppler Radar - traffic tickets and weather watching

17. So is there a “Sound Barrier” equivalent for light? What happenswhen an objecttravelling near thespeed of light,then turns on itsheadlights?

18. KWL Chart Evidence for the Big Bang: What do I already KNOW What do I WANT to know? What I have learned: