18 terms

# Energy Waves

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Amplitude
Measure of the energy a wave carries. One-half the distance between a crest and a trough of a transverse wave. This property controls the loudness of a sound wave, which can reduce your ability to hear well.
Crest
Highest point of a wave
Trough
Lowest point of a wave
Frequency
Number of waves that pass a given point in one second; measured in waves per second, or Hertz (Hz). Gamma Rays have the greatest.
Wavelength
The length of a wave; the distance between a point on a wave and the identical point on the next wave. This is the characteristic that determines where they occur on the electromagnetic spectrum. The color red has the longest.
Wave
A rhythmic disturbance that carries energy. A motion of a vibration.
Energy
The ability to do work or cause motion.
Vibration
Back and forth motions. Example: Hitting a tuning fork produces a high-pitch sound.
Matter
Anything that has mass and take up space.
Medium
Matter through which waves transfer energy.
Seismic Waves
Vibrations that travel through the earth's crust, carrying the energy of motion released during an earthquake. It is a type of transverse wave that can damage buildings.
Water Waves
Waves that move outward from a disturbance on the water.
Energy Transfer
When molecules pass the energy of motion to other molecules, then return to their state of rest.
Light Waves
Energy produced and given off from a light source. Type of electromagnetic radiation. Matter/Medium is NOT required for energy transfer with this type of wave.
Sound Waves
Compressional/longitudinal waves through which vibrations create noise. Matter/Medium required for energy transfer with this type of wave. They move in all directions from the source.
Frequency X Wavelength
Formula to solve for the speed of a wave
200 m/s
A wave has a frequency of 10 Hz and a wavelength of 20 m. What is its speed?
50 m/s
A wave has a frequency of 5 Hz and a wavelength of 10 m. What is its speed?