Waves Flashcards
what do waves do?
Transfer energy and information.
How is the energy transferred?
By oscillations in the material which the wave is travelling through.
Name the 2 types of waves and give an example
Longitudinal - Sound
Transverse - Light + electromagnetic spectrum
what does a longitudinal wave look like?
Small thin lines that bunch together then spread apart again and again.
what does a transverse wave look like?
Roundish waves that go up and down.
what happens to the oscillations in a longitudinal wave?
They are parallel to the direction of the wave.
What happens to the oscillations in a transverse wave?
They are perpendicular to the direction of energy.
What is the period of a wave?
Time taken for 1 complete wave.
What is the peak of a T wave?
The top of a wave
What is the trough of a T wave?
The bottom of a wave
What is the amplitude?
From the peak or trough to the mid-point.
What is the mid-point?
The middle of a wave represented by a line.
What is the bunched areas of L wave?
Compression
What is the spread out area of an L wave?
Rare-fraction
What is the frequency?
The number of waves per second.
What happens to a T wave if a noise gets louder?
- amplitude increases
- but wavelength and frequency stay the same
What happens to a T wave if a pitch becomes higher or lower?
Low High
- long wavelength - short wavelength
- low frequency - high frequency
- amplitude the same - amplitude the same
how do sound waves occur?
When sound hits objects and they sat to vibrate.
What is an echo?
When sound hits something and it bounces off it to create the echo.
What is the equation triangle for waves?
V (speed) is on top with ➗, and frequency and wavelength underneath with a ✖️ inbetween
