Waves, Sounds and Light Definitions and Principles Flashcards
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Pulse
Singular disturbance that is propagated by a medium
https://phet.colorado.edu/sims/html/wave-on-a-string/latest/wave-on-a-string_all.html
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Amplitude (A)
Maximum disturbance of a particle from its position of rest (equilibrium position)
★Think of the top wave and distance from the straight part
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Transverse Pulse
Pulse in which the displacement of the particles of the medium are perpendicular to the direction of the movement of the pulse.
★Straight up
★None of that jiggly wiggly stuff
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Pulse Length (D)
Distance between the start and end of a pulse
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Pulse Speed (v)
Distance covered by the pulse in one second
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Interference
two pulses in the same medium meet and interact with each other
★ Constructive
★ Destructive
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Constructive Interference
- Two pulses meet each other on the same side of the rest position.
- Results in pulse with greater amplitude
- After overlapping they will continue in their original directions and amplitudes
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Destructive Interference
two pulses meet on opposite sides of the rest position.
★ Smaller amplitude
★ After overlapping they will continue in their original directions and amplitudes
Explain
Principle of Superposition
the algebraic sum of the amplitudes of the two pulses that occupy the same space at the same time
★ During interference add the pulse
★ Algebraic (pluses + and minuses -)
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Transverse Wave
a wave in which the particles of the medium vibrates perpendicular to the direction of the motion of the wave
★ Repetition of transverse pulse
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Crest
- Highest part of a wave
- Maximum displacement from its position of rest
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Trough
- lowest part of a wave
- Max displacement from the position of rest in the opposite direciton
Define
λ - Wavelength (m)
Distance between two consecutive points in phase
Explain
Points in Phase
Points moving perfectly in step with one another.
* same direction
* same position on wave
Explain
Perfectly Out Of Phase
Same distance from the place of rest, just on opposite sides of place of rest
