Superposition Two particles cannot occupy the same space at the same time, two waves can When two...
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Transcript of Superposition Two particles cannot occupy the same space at the same time, two waves can When two...
SuperpositionTwo particles cannot occupy the same space at
the same time, two waves canWhen two waves interact, one is super imposed
on the otherThe resultant wave is a combination of both
waves
Constructive InterferenceConstructive interference occurs when similar
parts of both waves occupy the same point in space
Transverse WavesCrest meets crestTrough meets trough
Longitudinal WavesCompression meets compressionExpansion meets expansion
Resultant wave with greater amplitude
Destructive InterferenceDestructive interference occurs when
different parts of both waves occupy the same point in space
Transverse WavesCrest meets trough
Longitudinal WavesCompression meets expansion
Resultant wave with much smaller (or zero) amplitude
Phase DifferencePhase difference refers to the alignment of
two wavesA phase difference of 0° or 360° (0, 2π)
means the waves are in-phaseConstructive interference
A phase difference of 180° (π) means the waves are out of phaseDestructive interference
Noise Cancelling HeadphonesUses destructive interference to eliminate
background noiseA microphone detects incoming soundsSpeaker produces opposite signal,
destructively interferes with ambient noise
Multi-point interferenceWaves created by two or more different
sources interfere with each other
ReflectanceWhen a wave
encounter a boundary some of the wave is reflected back
The reflectance depends on the material of the boundary
The reflected waves interfere with the incoming waves
Auditoriums vs. Gymnasium