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Physical Science 3/9

TermDefinition
Waves oscillation that carries energy
Oscillation an up or down, back or forth motion
Vacuum Space that has no matter in it
Mechanical Waves Waves that move through matter
Types of Mechanical Waves transverse and longitudinal waves
Electromagnetic Waves Waves that move through vacuums
Types of Electromagnetic Waves light waves, x-rays, radio waves
Wave Properties Amplitude, Wavelength, Frequency, Wave Speed
Amplitude One half of a distance between a waves high point
Crest Wave's high point
Through Wave's low point
Resting Point the position where the medium would take place if there were no wave
Wavelength and Symbol measured from one point on a wave to the same point of another wave. lambda
Wavelength Units meters
3 Ways to Measure Wavelengths crest-to-crest trough-to-trough resting point-to-resting point
Frequency the number of waves passed through a fixed point in a certain amount of time
Units for Frequency Hz
Wave Speed the time it takes for a wave to move from one to another
Wave Speed Unit v
Wave Speed Equation v=f x lambda
Medium a substance that makes it possible for energy to go from one place to another
Reflection (example) When a wave bounces off a surface. when you look into a mirror
Law of Reflection waves being reflected in a particular way
Reflected Ray when it bounces off the barrier
Incident Ray when a wave moves towards the barrier
Diffraction (example) the bending of waves around a barrier. when ocean waves come to a pier
Refraction (example) caused by waves traveling at different speeds through different mediums. legs looking short in a pool
Interference waves colliding with each other
Constructive Interference when waves collide and cause of bigger wave
Destructive Interference when they collide and cancel each other out
Absorption the transfer of energy from a wave to matter as a wave passes through it
Absorbed Colors all the colors are absorbed and we only see one color
Reflected Colors the color we see when all other colors are absorbed
Electromagnetic Spectrum radio waves > microwaves> infrared> visible light>ultra violet> x-rays>gamma rays
Visible Light Spectrum what we can see from 700 nanometers to 400 nanometers
Longitudinal Wave a wave that oscillates in the same direction it moves
Expansion how far apart the waves are
Compression how close the waves are
Intensity how much energy a sound wave carries through a certain spot
Units of sound dB
Pitch our perception of the sound waves frequency
Analog Signal carry information continuously but vary in amplitude and frequency
Digital Signal send information as wave pulses
Created by: dyllan2003

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