WJHS - Electromagnetic Spectrum

Terms	Definitions
Transverse Wave	Particles move up and down as the wave moves forward
THz	1,000,000,000,000 Hz = The range of frequencies of visible light
1 Meter	1,000,000,000 nanometers (nm) = the range of wavelengths of visible light
Frequency	Refers to the number of complete cycles, crest to crest,or trough to trough that occur per second. Units are the Hertz = Hz
Crest	Waves are labeled with positive and negative motion. The _________ is the extreme on the positive (+) side.
The Electromagnetic Spectrum	A group of energy forms including radio waves, microwaves, and gamma rays.
Sir Isaac Newton	Conducted the first experiments using prisms to prove that white light is made of colors.
Amplitude	This is the distance from "rest" to "crest"
Trough	Waves are labeled with positive and negative motion. The _______ is the extreme on the negative (-) side.
Reflection	When a light wave meets a boundary it can be bounced off a surface.
Wave	Caused by a disturbance that transfers energy from one point to another.
Longitudinal Wave	Particles move back and forth (oscillate) like a slinky.
Refraction	Occurs when a wave crosses a boundary from one medium to another causing the speed of light to change.
Wavelength	The distance from crest to crest or trough to trough.
Lasers	A device that works by agitating, then organizing, then energizing particles enough that they stay as a very tight beam of one frequency = one color
Diffraction Grating	The plastic material in the eyepiece of a spectroscope covered with very close, straight lines.
Kinetic Energy	Radiant energy is an example of this type of energy
Spectroscope	A device that uses diffraction to view the spectrum colors of light.
ROY G BIV	Colors of the visible spectrum
Radiant Energy	A form of kinetic energy that can travel through the vacuum of space.