3) Describing Waves and Sound Flashcards
(25 cards)
In which way do the vibrations travel in a transverse wave?
They go up and down
Give examples of waves that are transverse:
Light, Electromagnets and Ripples in Water
In which direction does longitudinal vibrations travel?
The same direction as line of travel
Give an example of a wave that is longitudinal:
Sound Waves
What are compression in longitudinal waves?
They are vibrations that are close together
What are rarefactions in longitduninal waves?
They are vibrations that are spread out
What is the amplitude of a wave?
The distance between the highest point and the line of equilibrium
What is the frequency of a wave?
Number of waves per second, measured in Hertz (Hz)
What is the wavelength of a wave?
The distance between one point on a wave and the same point on another
What is the period of a wave?
The time it takes to produce one wave
What are waves?
They are a transfer of energy through a space or object
Do waves move particles that they come into contact with?
They do not move the particles, they just vibrate them, which vibrates others. The particles just pass energy along
Can sound waves be reflected?
Yest
Can sound waves be refracted?
Yes
Can sound waves be diffracted?
Yes
What is the frequency range of human hearing?
It is between 20Hz - 20,000 Hz
How do you measure the speed of sound in air?
1) You measure the distance between the two distances
2) See sound start - start stopwatch
3) When hear sound - stop stopwatch
4) Use this information to calculate it
What do microphones do?
They detect sound waves
What is an oscilloscope?
They are a graph drawing design - draws a graph of an electrical signal
The mores something vibrates, …
The higher the frequency
The higher the frequency, …
The higher the pitch
The more vibrations of a wave, …
The higher the pitch
The bigger the vibrations, …
The higher the amplitude
The higher the amplitude, …
The louder the sound
