Doppler Effect - St. Mary's Physics Online

D.  Doppler Effect – variation in the observed frequency of a wave when there is relative motion between the source of the wave and the receiver

Doppler Effect V = 14 m/s (B. Barrett)

Doppler Effect V = 18 m/s (B. Barrett)

 

 

 

 

 

 

 

The Doppler Effect  II - Colorado University

 

 

Jet breaking the speed of sound - Explanation - Cambridge U.

A "sonic boom" is heard when a plane
 exceeds the speed of sound.

The crack of a whip is the tip is the sound of the
tip breaking the speed of sound. 

 

 

 

The Doppler Effect - Michael Fowler -  Flashlets


 

Which way is the source of this wave moving?

 

 

Doppler Effect - Mouse - St. Mary's HS Physics

Radar Guns & Waves - St. Mary's HS Physics

 

 

 

E.  Wave Front – locus of adjacent points on a wave which are in phase

Top View

 

Ex) If the distance between the arrows in the picture below is .90 cm, what is the wavelength of this wave?


 

III. Periodic Wave Phenomena

 

Interference – effect produced by two waves passing simultaneously through a region

Interference -  1 | 2 | 3 | Doane College

 

 

1. Superposition – when waves overlap, the resultant displacement is the algebraic sum of the individual displacements of each wave

 

Superposition - (rope)- Monterey Institute

 

a) Constructive Interference -

Constructive Interference - (Jason P. - 2005)

1)

 

 

2)

Amplitude?

 

 

2A

 

3)

 

 

 

Waves reemerge as separate waves

 

Constructive Interference II (R. Meija - 2005)

 

b) Destructive Interference

Destructive Interference - (Jason P. - 2005)

1.

 

2. At the moment they overlap the wave amplitudes cancel

 

(for a moment)

 

3. Waves reemerge as separate waves

 

 

As the two waves pass through each other, the medium at point P will

(1) vibrate up and down

(2) vibrate left and right

(3) vibrate into and out of the page

(4) remain stationary

June 2004

 

 

 

(4) remain stationary

 

 

What will the amplitude of the resultant wave be when wave A and B meet at point X?

Jan. 2004

 

 

 

 

 

+1

 

 

 

 

 

2. Symmetrical Lines of Interference

Interference Animation

(Right Click, Save As)

= Penn State Animations for Astronomy and Physics

 

 

Symmetrical Lines of Interference - St. Mary's Physics Onle

 

- wave patterns produced by the overlap of 2 wave fronts in phase

Two Slit Diffraction (B. Barrett)

 

Maximum Destructive Interference -
Phase Difference - 1/2 wavelength

Double Slit - Wavelength Difference
-
Michael Fowler Flashlets

 

 

 

 

 

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