1 / 5

Tuesday February 21, 2012

Tuesday February 21, 2012. Warm Up Which of the following describes when a wave bounces off a barrier? refraction wave reflection rarefaction. Classwork: #55 Wave Behavior Foldable Homework: Complete foldable questions Quiz Thursday .

harlow
Download Presentation

Tuesday February 21, 2012

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. Tuesday February 21, 2012 • Warm Up • Which of the following describes when a wave bounces off a barrier? • refraction • wave • reflection • rarefaction Classwork: #55 Wave Behavior Foldable Homework: Complete foldable questions Quiz Thursday

  2. Pg 1 – When a wave hits a barrier this can happen…… • Reflection is when a wave bounces back after hitting a barrier • Not all waves are reflected, if the wave goes through a substance it is transmitted • Diffraction – when waves curve or bend as they go around a barrier or through an opening • Sound diffracts more than light because sound typically has longer wavelengths

  3. Pg 2: When a wave enters a new medium this happens…. • Refraction – bending of a wave as it passes into a new medium • As it enters the new medium, the wavelength and wave speed change, causing the wave to travel in a new direction making it look like it bends

  4. Pg 3 & 4 : When 2 or more waves meet this can happen…. • Constructive interference – when 2 waves combine to create a wave with larger amplitude • EX: if you all talk at a whisper the sound waves combine to make a larger noise • Destructive interference – when 2 or more waves combine and cancel each other out • EX: “Beats” headphones produce low frequency sound waves that block out noise • Standing wave – certain parts of wave always undergo destructive interference • The wave reflects back creating areas that are flat (destructed) and areas that are larger (constructed) • Resonance – 2 objects naturally vibrate at same frequency • 1 object vibrates causing other to vibrate as well

  5. Pg 5 & 6 Wave Behavior Questions • Observe the pencil in the glass of water. What concept does this illustrate? Explain how this happens • What concept describes your ability to hear someone talking around the corner. Explain what is happening to the sound waves • What is the difference between the 2 types of interference? • Explain how the “Beats” headphones block out all outside noise?

More Related