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7PS1Energy and Waves

Energy and Waves

TermDefinition
The number of wavelengths that pass through a given point each second FREQUENCY
The range of all electromagnetic waves, including those that can and cannot be seen with the human eye. ELECTROMAGNETIC SPECTRUM
The distance between two peaks (or troughs) on one wave. WAVELENGTH
A form of energy that travels in electromagnetic waves. A small fraction of this energy is visible to the human eye but most of it is invisible. LIGHT ENERGY
The bouncing of light or sound off an object. REFLECTION
The bending of light as it moves from one material to another REFRACTION
Waves of energy that require a medium through which to travel. Examples: seismic waves, sound waves, water waves. MECHANICAL WAVES
Waves of energy that do not require a medium through which to travel. Example: light waves ELECTROMAGNETIC WAVES
The reaction that occurs on the sun in which hydrogen atoms collide and their nuclei fuse to form helium and HUGE amounts of energy. NUCLEAR FUSION
Waves of energy in which the motion of the medium is parallel to the direction of the wave. (The medium moves in the same direction of the wave) ex: sound waves LONGITUDINAL WAVES
Waves of energy in which the motion of the medium is at right angles to the direction of the wave. (The medium moves up and down while the wave moves left to right) ex: light waves TRANSVERSE WAVES
The part of the electromagnetic spectrum past the violet light of the visible spectrum. It cannot be seen but can be felt and causes sunburn. ULTRAVIOLET LIGHT
The part of the electromagnetic spectrum that is visible to the human eye. It includes red, orange, yellow, green, blue, indigo, and violet. VISIBLE LIGHT
The portion of the electromagnetic spectrum just before the red light of the visible spectrum. It is evident in the heat given off by objects and organisms. INFRARED LIGHT
Anything that has mass and volume (takes up space). MATTER
The building blocks of matter, made up of atoms that are chemically bonded. MOLECULES
Matter with particles that are far apart that move freely with random motion. GASES
Matter with particles that are close together and slide past each other in random motion. LIQUIDS
Matter with particles that are very close together and that move (vibrate) in a regular pattern. SOLIDS
The distance between the incoming (original source) wave and the imaginary perpendicular line. ANGLE OF INCIDENCE
The distance between the reflected wave and the imaginary line. ANGLE OF REFLECTION
The angle of reflection is equal to the angle of incidence. LAW OF REFLECTION
When a wave passes a barrier or moves through a hole in the barrier, it bends and spreads out. DIFFRACTION
Two waves combine to make a larger amplitude in a wave. CONSTRUCTIVE INTERFERENCE
A wave that appears to stand in one place. It's really two waves constructively interfering as they pass through each other STANDING WAVE
The points on a standing wave that have an amplitude of zero. NODE
The points of maximum amplitude on a standing wave. ANTINODE
Occurs when vibrations traveling through an object match it's natural frequency. RESONANCE
Two waves combine to make a produce a smaller amplitude in a wave. If amplitudes are the same and crest and trough line up, a zero amplitude occurs. DESTRUCTIVE INTERFERENCE
Waves that travel through Earth, caused by an earthquake SEISMIC WAVE
Primary wave; fastest traveling seismic waves; travel all the way across Earth. P-WAVE
Secondary wave; travel more slowly than P-waves; can't travel through liquid so stop at Earth's outer core. S-WAVE
Occur only on Earth's surface; slowest traveling seismic waves but cause the most damage. SURFACE WAVE
Created by: bphelan
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