Parts of a Wave
A vibration that transfers energy from place to place
Wave
How do the particles vibrate in a longitudinal wave?
Back and Forth
In the same direction as the wave
What is a major difference between any type of waves on the EM spectrum?
Their frequency
What EM wave do we feel as heat?
Infrared
The distance between two crests OR two troughs of a wave.
Wavelength
The pressed together regions in a longitudinal wave are called ____.
Compressions
Which EM wave has the greatest frequency?
Gamma Rays
We use sunscreen to protect our skin from what type of rays?
Ultraviolet
What determines the strength of a wave?
Amplitude
What type of wave transfers energy?
BOTH!
Transverse AND Longitudinal
DOUBLE JEOPARDY
All EM waves travel at the same ______.
Speed
EM waves that pass through our skin and take pictures of our bones are...
X-Rays
Which two have a relationship?
a. amplitude and wavelength
b. pitch and crest
c . wavelength and frequency
c . wavelength and frequency
What type of wave contains crests and troughs?
Transverse
The color of visible light with the shortest wavelength and highest energy.
Violet
EM wave used to kill cancer cells.
Gamma Rays
DOUBLE JEOPARDY:
What is the frequency of a sound wave in which 7,920 cycles occur in 18 seconds?
440 Hz
** Cycles divided by time = frequency
Can sound travel through a vacuum (e.g. space)?
NO.
**Longitudinal waves are mechanical waves and need a medium to travel through!
What are the 3 behaviors of light?
Make sure you explain!
1. absorption : The medium catches all of the energy from the waves
2. reflection: The wave bounces off the medium
3. refraction: The light bends as it passes through the medium
What is the correct order or EM waves from LOWEST frequency to HIGHEST frequency?
Radio
Microwaves
Infrared
Visible
UV
X-Ray
Gamma