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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?

 0 degrees 90 degree 180 degrees 270 degrees 360 degrees 0.0 m 3 m 6m 9 m 12 m

Transverse wave - medium move in 2 directions

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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

˝, 1˝, 2˝ etc wavelengths apart

A & C, B & D, F & H

Which 2 points are in phase?

C and F

2 points that are 180°
out of phase
?

B and D

E and G

E. Wavelength – distance between two consecutive points in phase

• determined by medium

• symbol  λ = lambda

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- length of one cycle #m/cycle

Wavelength?

Dan Hosey
- Pittsford Sutherland HS

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