1. Energy. Two main types of waves are mechanical and electromagnetic. Different types of energy waves. Movement within the Earth's crust can cause devastating seismic waves. Medical scientists use ultrasound and other types of waves to scan the inside of the human body.
1. These do NOT need matter to travel through.
2. Remember: Rowdy Martians in our unusual x-ray game.
a. Light is an example.
b. The wave people create in a ball game is another example.
c. The movement of a guitar string is another example.
See animated pictures @
http://www.acs.psu.edu/drussell/Demos/waves/wavemotion.htmlC. How energy moves
The space shuttle produced sonic booms as it left the Earth’s atmosphere. So does lightning (thunder is a sonic boom).
A. Radio waves are the largest waves (cell phones, cable tv, radio, telescopes).
was the first
to send a wireless signal
(using a telegraph) in 1895, but
Nikola Tesla was the first
to patent it.
In 1932, Karl Jansky at Bell Labs revealed that stars and other objects in space radiated radio waves.
1. Roy G. Biv
2. From longest to shortest: red, orange, yellow, green, blue, indigo, violet.
or scattered depending on the composition of the object and the wavelength of the light.