Waves (Waves transfer energy (A wave is a disturbance. (Forces and waves…
Waves transfer energy
A wave is a disturbance.
Transfers energy from one place to another.
Forces and waves
Rope wave is up and down.
Water waves are outwards on a plane.
Earthquake waves transfers as hemisphere.
Materials and Waves
Medium is what wave moves through
Through matter is mechanical.
There are other waves, such as light and sound, that move differently.
Energy and waves
Energy (kinetic) is transferred.
Waves can be classified by how they move.
Transverse waves moves perpendicular to direction of disturbance.
Longitudinal waves are similar to springs.
Waves have measurable properties.
Waves have amplitude, wavelength and frequency.
Measuring wave properties
Amplitude is between highest (crest) and lowest (trough)
Crest to crest/trough to trough is wavelength.
Frequency is how many crests or troughs happen per second.
Frequency and wavelength are related
Frequency increases, wavelength decreases.
Graphing wave properties:
For springs, y= distance between coils, x is wavelength (see textbook images)
Wave speed can be measured
Speed is wavelength times frequency
Waves behave in predictable waves
Waves interact with materials.
Reflection: some waves bounce off of things.
Refraction: bending of wave as it enters at angle other than 90 degrees (such as straw in water)
Diffraction: Spreading of waves through opening or around edge of obstacle (see textbook images)
Waves interact with other waves
Waves adding together: Same waves at same time merge together.
Waves cancel each other out if the crest and trough contrast