BEHAVIORS
Reflection
Bouncing of Light
Red/Martians
Radio/Microwave
This type of interference makes louder sounds
Constructive, because it is "adding" together the waves to make them higher in amplitude, and sound.
Crest
Top of the wave
Longitudinal Waves
particles move parallel to the direction which this wave moves, a.k.a. “compression waves”
Bending of Light
Refraction
Invaded/Venus
Noise canceling headphones are an example of what kind of interference?
Destructive because the wave either has no sound (amplitude) or a low sound (amplitude).
Trough
Bottom of a wave
Transverse Waves
particles move perpendicular to the direction which the wave moves
Diffraction
Spreading out of Light
Ultraviolet/X-Rays
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Wavelength
distance between successive parts of a wave (Crest-to-crest or trough-to-trough)
Frequency/Period/Wavelength
Frequency: the number of cycles (or oscillations) per second (f unit: Hz 1/sec)
Period: the time it takes for one cycle
(T unit: seconds)
Wavelength: the distance “crest-to-crest” or “trough-to-trough” (or the distance to complete one full cycle)
(Lambda λ unit: meters)
Polarization
Guns
Gamma Rays
Constructive Interference
When 2 waves meet in-phase and the resulting wave is higher in amplitude.
Amplitude
distance from normal resting position to the top of the crest (or to bottom of the trough)
PARTS OF A COMPRESSION WAVE
Compression: an increase in medium density
Rarefaction: a decrease in medium density
Interference
Superposition of 2 or more waves. Constructive or Deconstructive.
LOW E --> HIGH E (visible colors)
Red-->Violet (R O Y G B I V)
Destructive Interference
When 2 waves meet out-of-phase and the resulting wave is lower in amplitude.
Node/Antinode
Node: point of zero amplitude; rest position
Antinode: point of maximum amplitude; is the
crest / trough
PARTS OF A COMPRESSION WAVE Pt. 2
Wavelength (λ): distance between successive parts of a wave
(Compression-to-compression, or rarefaction-to-rarefaction)