1 / 11

Waves

Discover the fascinating behavior of standing waves, interference, nodes, and antinodes in this informative resource. Learn about constructive and destructive interference, reflection, refraction, diffraction, and the Doppler Effect. Explore how waves behave when they meet barriers or change mediums.

toledo
Download Presentation

Waves

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. Waves Part II: Behavior

  2. Standing Waves • Standing waves are a result of interference. • Combination of incident and reflected waves • Two waves of equal amplitude and wavelength pass in opposite directions. • Node – stationary point where waves are always out of phase. • Antinode – largest point of amplitude The Wave Machine http://www.cbu.edu/~jvarrian/applets/waves2/simwav_g.htm

  3. Standing Waves Due to interference Nodes “out of Phase” Antinodes “In phase”

  4. Interference - waves combine Destructive or Constructive Interference http://users.erols.com/renau/wave_interference.html

  5. Principle of Superposition • When two or more waves meet, there is interference. • The displacement caused by two or more waves is the algebraic sum of the individual waves • Constructive interference – waves in phase add • Destructive interference – waves out of phase subtract

  6. Reflection • When wave reaches a barrier at least part of the wave bounces back. • Angle of incidence equals the angle of reflection • http://www.physicsclassroom.com/mmedia/waves/fix.html

  7. Change in Media • A place where the substance the wave is traveling through changes • Example: A light wave traveling through air passes through a glass window • Some of wave is transmitted and some is reflected

  8. Refraction • When a wave travels in a different medium the velocity changes • This change in velocity results in bending of the wave. • This is why a pencil appears to bend in a glass of water.

  9. Diffraction • Waves normally travel in a straight line in a medium. • When waves meet a barrier, they bend around the edges. • This is called diffraction. • http://www.control.co.kr/java1/masong/oneslit.html

  10. The Doppler Effect • The apparent change in frequency of a wave due to the motion of the source or receiver. • Greater speeds produce greater effects. http://library.thinkquest.org/19537/java/Doppler.html http://www.control.co.kr/java1/masong/doppler.html

  11. Doppler effect - Examples • car horn • sirens • radar gun • light • increase frequency – blue shift • decrease frequency – red shift

More Related