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Wave properties

# Wave properties

NGSS.MS:
MS‑PS4‑1
,
MS‑PS4.A.1
,
MS‑PS4.A
Review your understanding of wave properties in this free article aligned to NGSS standards.

## Key points:

• A wave is a repeating disturbance that travels through matter or space transferring only energy.
• Below is a model of a wave.
A diagram of a wave that goes up and down four times. There is a horizontal line through the middle. The parts of the wave above the line are crests, and the parts below the line are troughs. The distance from the center line to each crest or trough is the amplitude. The distance between the top of one wave and the top of the next wave is the wavelength.
• A wave’s crest is its highest point, and its trough is its lowest point.
• A wave’s amplitude is the maximum distance (positive or negative) a wave reaches from its rest position.
• Wavelength is the distance between the same spot on two sections of a wave.
• A wave’s frequency can be measured by how many crests (or how many troughs) pass a location in a certain amount of time.
• A wave with a larger frequency has more energy. If a wave’s frequency doubles, its energy also doubles.
• A wave’s energy is proportional to the square of its amplitude. So, if a wave’s amplitude doubles, its energy increases by four times, because 2, squared, equals, 4.

## Want to join the conversation?

• Is there a certain name for the starting point of a wave?
• Yes, the origin
• What ocean has waves with the higest frequency?
• not that type of wave bro
• What gives the wave energy
• A wave is one way of how energy travels, so the wave is energy itself. How the energy travels as a wave, such as its velocity, depends on the type of energy however. A pulse of electromagnetic energy, for example, such as lighting, will travel at a higher frequency than that of sound energy.
• why does the wave go up and down?
• Doesn't have to. Depends on how the energy is moving.
• why are khan academy comment sections so braindead
• Do you play valorant lol
(1 vote)
• are u gay
• idk are u?(;