> Use "Waves" video (see below) as a segue between the lab activity, "Making Waves" (light & sound) and related follow-on labs: "The Spectacular Spectrum - Separating Light" (light); "The Optics Files - Using Mirrors and Lenses" (light); and "Sound's Cool! - Exploring Sound Waves (Computer)" (sound). http://dep.disney.go.com/educational/store/detail?product_id=77A58VL00 Waves Enhanced Classroom Edition (DVD) Part of Bill Nye the Science Guy Classroom Edition DVD Complete Series Price: $49.95 Subject Area: Science & Nature Grade Level: Intermediate, Junior High, High School Product ID: 77A58VL00 Bill Nye the Science Guy on Classroom Edition DVD is an adaptable format that allows you to access the wildly popular Bill Nye series on any DVD-equipped computer or set-top DVD player. Catch a few waves with Bill Nye the Science Guy! In "Waves," Bill explores sound waves, light waves, seismic waves, energy waves, and even "the wave" that's so popular with stadium crowds. In addition to the complete 26-minute episode of "Waves," this disk is loaded with incredible DVD features like: *Fully indexed "chapters" correlated to National Science Standards. *Interactive glossaries and quizzes. *Bonus footage of never-before-seen segments, interviews, and demos. *Spanish translation and closed-captioning. *On-disk implementation Guide. This program is also available on video. Edition Details Release Date: 2004 Running Time: 26 minutes Format: DVD (Closed captioned) Additional Features: Marc Record Available == The symbol for "wavelength" is lowercase Lambda (looks a little bit like the symbol for "pi"). http://en.wikipedia.org/wiki/Lambda == Google Search: sound + node + antinode http://en.wikipedia.org/wiki/Node_(physics) http://en.wikipedia.org/wiki/Category:Waves http://en.wikipedia.org/wiki/Category:Wave_mechanics http://en.wikipedia.org/wiki/Longitudinal_wave http://www.glenbrook.k12.il.us/gbssci/phys/Class/sound/u11l1b.html The Speed of Sound http://www.glenbrook.k12.il.us/gbssci/phys/Class/sound/u11l2c.html http://www.glenbrook.k12.il.us/GBSSCI/PHYS/Class/sound/u11l5c.html -- Point of Focus: Velocity is constant (either speed of light or sound), therefore frequency and wavelength are mathematically related: frequency (f) and wavelength (lambda) are inversely proportional to each other because their product is the constant wave speed: v = f x lambda [Note: Symbol used for wavelength is lowercase lambda.] http://www.sengpielaudio.com/calculator-wavelength.htm 1. Acoustic waves or sound waves in air 2. Radio and light waves in a vacuum -- Broadcast Radio FM = 88-108 MHz or 3.406732477 m (340.673247727 cm) to 2.775856093 m (277.585609259 cm) AM = 530-1600 kHz or 565.64614717 m (56564.614716981 cm) to 187.37028625 m (18737.028625) Amplitude modulation: http://en.wikipedia.org/wiki/Amplitude_modulated Frequency modulation: http://en.wikipedia.org/wiki/Frequency_modulation -- Cordless phone frequencies: 900 MHz vs. 2.4 GHz 900 MHz = 0.333102731 m (33.310273111 cm) 2.4 GHz = 0.124913524 m (12.491352417 cm) IEEE 802.11b/g wireless Ethernet also operates on the 2.4 GHz band, and most microwave ovens use 2.45 GHz.