|
Home
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

Standing Wave
|