Spring 1516

Saturday, March 5 2016 @ Cypress High School

Topics: Wave, sound, and light

James' Stuff

http://www.walter-fendt.de/phys.htm - Wave simulations and lots of good stuff (beats was featured); Pick Java unless you're using a device that doesn't have Java (then pick HTML5); (click the English flag to switch to English language)
http://ophysics.com/ >(under waves)
http://www.thephysicsaviary.com/ - Lots of simulations of labs (even uses 'equipment' that look like lab equipment) - can use to supplement your in-class labs.
All of these apps on these sites run on smart phones and Chromebooks. So until PhET gets around to convert the rest of their simulations to do so as well, these all work pretty well.
Wave pattern for double slit interference (Word doc | Excel spreadsheet) - so students can understand the idea of "path difference". Excel spreadsheet & word document.
Hologram on a smartphone (template on Word doc)
I didn't get to this with all the groups, so if you want to see what this is go to: http://www.popsci.com/how-to-make-smartphone-hologram
(This one uses a transparency and a simple template - easier!) https://www.youtube.com/watch?v=7YWTtCsvgvg
(This one uses CD/DVD cases and cutting the clear plastic.)
Pasco Color Mixer & Cards: https://www.pasco.com/prodCompare/color-mixer/index.cfm
A color-mixing matching game that students can do on their phones. (quite addicting & frustrating!) http://www.thephysicsaviary.com/Physics/Programs/Games/ColorGame/index.html

Virtual Ripple Tank - Download "Zip archive of this applet". Open the zip file and open the "ripple.jar" file (requires Java to be installed on your computer).
Wave PPT presentation
Making waves on paper

Instructions: http://www.instructables.com/id/Candy-Wave-Machine/
Alternative/supplement - PhET wave simulator
Video about the wave machine: https://www.youtube.com/watch?v=FjPFW6gftas
Dean Baird's video with instructions: https://www.youtube.com/watch?v=RCbf9_4xN_E
Questions and things to point out

What's the medium?
Medium is not transferred
Transverse or longitudinal wave?
What direction does the medium vibrate relative to the direction of the wave?
How do you change the wave speed? (Speed does not change, must change medium)
Show constructive and destructive interference (kind-of)
Calculate the wave velocity
Make standing waves (and calculate the velocity using velocity = wavelength * frequency)

For a 3-meter long machine with dots spaced 4cm apart, you need 75 skewers, 150 dots (~55 dots per box)
Target sells Dots candies for $1/box (~55 Dots/box)