Notes 4: Wave Phenomena
Notes: Interference and Diffraction
is used to compare __________________
on different waves.
On the following wave points A and B are ___________________,
points B and C are
completely out of phase and points C and D are _________________________.
partially in phase
Superposition principle – Or Combining Waves
When two or more waves pass through the ________________________, the displacement at any point in the
sum of displacements by each wave,
medium is the ______________________________
1. Waves that are in phase and have the same frequency.
2. Waves out of phase, same frequency
4. Waves w/ different frequency
When two waves with very ____________________________
similar frequencies interfere they produce a new wave with
alternating high and low amplitudes.
High amplitude is heard as ______________________
and low amplitude as low volume.
Sounds like ___________________________
WA – WA – WA – wa – WA –
WA - WA
of waves around a corner
Example: hearing sound waves when the sources is ______________________,
around a corner Laser light bending around
Opening for waves should be only slightly larger than the
_______________ of waves passing through.
The pattern in the diagram represents wave ____________
troughs or bright and dark wave fronts.
laser light rays
Double slit experiment
When a wave pattern is passed through 2 adjacent slits,
____________________ occurs at each slit.
Alternating constructive and destructive
results in a projected
pattern on a screen.
Occurs when a wave producing source and an observer are in motion relative to one another.
In diagram A above the source of sound is ______________________________
Observer A and B both hear the same frequency as the frequency that is ______________
Note the wavelength is ______________
at all points surrounding the source
In diagram B above the source of sound is moving to ________________
at constant speed.
Observer C hears a _______________________
Higher frequency than the source is emitting.
The wavelength of sound waves the observer C hears is _____________________
Observer D hears a ______________________
lower frequencythan the source is emitting.
The wavelength of sound waves the observer D hears is ____________________