Review - Flashlight without Batteries??

Can you figure this out?

 

 

Trig. Review

Made using a spreadsheet created by Dan Hosey - Pittsford Sutherland HS

http://www.box.net/shared/ac55l0keyv / http://www.youtube.com/watch?v=gX3-4serqwk

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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St. Mary's H.S. Physics

 

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

 

 

Wavelength

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St. Mary's Physics Online

 

 

- length of one cycle #m/cycle

 

 

 

 

 

 

Wavelength?

Made using a spreadsheet created by Dan Hosey
- Pittsford Sutherland HS

http://www.box.net/shared/ac55l0keyv / http://www.youtube.com/watch?v=gX3-4serqwk

 

 

 

 

 

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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