#1 Flashcards
(30 cards)
Waves
A traveling disturbance of coordinated vibrations that transmit energy with no net movement of the medium
Medium def
The substance a wave travels through (air, water, ground)
Electromagnetic waves do not need a what
Medium
IR, light, radio
Transverse wave def
Wave oscillation is perp. To the direction the wave travels
Longitudinal waves def
Oscillation is parallel to the drection of the wave
Frequency def
of waves that pass a point in a certain amount of time
Units are HZ when time is in
Seconds
Period def
Time for 1 wave to pass a certain point
Most waves are a combo of
Both types of waves
Wave speed def
Rate of movement of the disturbance, not the particles
Medium plays a role in
Speed
Larger particles moves
More slowly
Strength of force plays a role in
Speed
Waves in a gas
Depends on ratio pressure on gas to density of gas
- ratio depends on temp
Wave propagation def
Showing how waves move on paper
Wavelength model did
Almost gets straight the farther it goes out
Ray model def
Energy is each wavefront or ray is equal
You have what the farther you get out
Less space between the energy
Reflection def
When a wave hits a boundary of the medium; or an abrupt change in the properties of the medium
Doppler effect
An apparent change in frequency of a wave due to the motion of the source of receiver
Sound frequency =
Pitch
In a specific medium, all the waves
Are at the same rate
Echolocation def
Using reflection of a wave to determine an objects location
Examples of echolocation
Radar & sonar
Waves leave the source
Wave reflects off object
& wave returns to the source
