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33 Cards in this Set
- Front
- Back
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What is a wave?
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A wave is an oscillation that travels, moving energy from one place to another.
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What is a vibration?
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A vibration is a fast back and forth motion.
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What is an oscillation?
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An oscillation means a motion that repeats reqularly,example harrmonic.
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The time for one cycle, a unit of motion that repeats itself is called?
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Period is the time it takes to do one cycle.
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What is frequency?
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Frequency means the numbers of cycles per second.
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What is a Hertz?
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A hertz is the unit of one cycle per second. ( Hz )
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60 Hetz means what?
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Means 60 cycles happen in one second.
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What is the formula Peroid and Frequency?
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T = 1 / f
T= time of one cycle (period) f = frequency in hertz |
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What is a wavelenght?
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A wave length is the lenght of one complete cycle.
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What is a wavelenght of this?
What harmonic is this? |
Formula is
( length / # bumps * 2 = Count bumps |
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What is a wavelenght of this?
What harmonic is this? |
Formula is
( length / # bumps * 2 = Count bumps |
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What is a wavelenght of this?
What harmonic is this? |
Formula is
( length / # bumps * 2 = Count bumps |
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If it takes 2 seconds to swing back and forth (cyle once) what is the period and frequency?
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Period is 2 seconds.
Frequency = 1/2 = .5 Hz |
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What is the crest of the wave?
What is the trough? |
. crest
trough |
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V = f *
means what? |
V ( m/sec)= f (hertz)* (meters)
Velocity is equal to frequency times wavelength. |
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What is the Velocity of a wavelenth .03 meters long traveling at a frequency of 4 hertz?
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V = f *
V= 4 * .03 = .12 |
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A wave has a speed of 30 meters per second and a frequncy of 10 hertz. Calculate it's wavelength?
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30 /10 = 3 meters
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If you see 5 waves go by in 30 seconds and each wave is 2 meters long, what is it's period, frequency, and wave speed?
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T= period= 30/ 5 = 6 seconds
f = 1/ T = 1/6 = .1667 hertz speed = f * .1667* 2 = .3334. |
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What is the amplitude of a wave?
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amplitude is the maximum distance from the average in harmonic motion.
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Lable the nodes and the antinodes?
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Nodes
antinodes |
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What is a wave?
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A wave is an oscillation that travels from one place to another.
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What is a standing wave?
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A standing wave is a wave that is confined in a space. (like string in experiment)
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What is the principle of superposition?
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The principle of superposition states the total vibration at any one point is the sum of the vibrations from each individual wave.
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What is constructive interference?
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When ways add up to make a larger amplitude.
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What is destructive interference?
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when 2 waves add up to make a smaller wave with smaller or zero amplitude.
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What is resonance?
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Resonance occurs when a period force has the same frequency as the natural frequency of the system.
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What is the natural frequency?
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The natural frequency is the frequency at which a system naturally oscillates.
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What is a transverse wave?
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A transverse wave has its oscillations perpendicular to the direction the wave moves.
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What are the 4 properties of waves?
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Absorption, reflection, refraction, diffraction
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What is absorption of a wave?
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Absorption of a wave is when waves are absorbed and disappear. (Everything absorbs waves)
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What is reflection of a wave?
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Reflection of a wave is when a wave bounces and goes in a different direction. (example Mirror)
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What is refraction of a wave?
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Refraction of a wave is the bending of a wave as it travels through different matterials. (ex. rod in water looks broken)
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What is the diffraction of a wave?
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Diffraction of a wave is the bending of a wave around an object.
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