Phase, Wavelength & Speed
Describing position, spacing, and motion in periodic waves
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Video Instruction showmethephysics.com
Review - Flashlight without Batteries?? Can you figure this out?
Trig. Review
Made using a spreadsheet created by Dan Hosey - Pittsford Sutherland HS At which positions do you find the following degrees?
Transverse wave - medium move in 2 directions
Remove your mouse from the animation to stop it. Show Me The Physics Website
D. Phase
"In Phase" (0° difference) – points on a single periodic wave that have the same displacement (from equilibrium position) and moving in the same direction
Whole number of wavelengths apart? A & ____ A & ____ B & ___ B & ___
A & E, A & I, A & M
B & _, B & _, B & _
B & F, B & J, B & N
"Out of Phase"– (1800 difference)
- same displacement from equilibrium position but going in a different direction
½, 1½, 2½ etc wavelengths apart
A & C, B & D, F & H
Which 2 points are in phase?
C and F
2 points that are 180°
B and D E and G
E. Wavelength – distance between two consecutive points in phase
[ HTML5 ]
- length of one cycle #m/cycle
Wavelength?
Made using a spreadsheet created by Download /
4 meters
Ex) Wavelength?
June 2000 Regents
λ = 5.0 m/2.5 cycles
λ = 2.0 m
Ex) Amplitude? Wavelength?
Amplitude = .10 m Wavelength = .60 m
Ex) Amplitude A?, B?, C?
Jan 2004
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