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70 Cards in this Set
- Front
- Back
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Simple harmonic motion |
vibratory motion from an equilibrium position
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Period
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Time required to make a to and fro wave motion
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Frequency
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cycles per unit time
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Wave
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A disturbance traveling through a medium or in a vacuum
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f=1/T
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Formula for frequency
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Wave Pulse
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Single unrepeated disturbance
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Lambda
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Unit for the wavelength
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Mechanical Waves
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Requires a medium to propagate
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Electromagnetic Waves
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Can travel in a vacuum and in material media
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Wave Train
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Succession of periodic disturbances
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Transverse Waves
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Particles of the medium vibrate perpendicularly to the direction of the wave propagation
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Longitudinal Wave
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Particles of the medium vibrate perpendicularly to the direction of the wave propagation
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Compressions
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corresponds to the Crest
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Rarefactions
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correspond to the troughs
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Seismic Waves
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Both longitudinal and transverse waves
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Body Waves
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This type of seismic wave travels through earth's interior
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Surface Waves
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This type of seismic wave travels at the surface
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P wave or Primary Wave
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This type of body wave is Longitudinal
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S Wave or Secondary wave
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This type of body wave is transverse
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Love Waves
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This type of surface waves are transverse waves that move the ground in a horizontal direction
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A.E.H. Love
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Love waves were named after him
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Rayleigh Waves
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What we feel during an earthquake
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James Clerk Maxwell
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He predicted the existence of electromagnetic waves
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1862
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The year Maxwell predicted the existence of electromagnetic waves
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Heinrich Hertz
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Observed the existence of electromagnetic waves
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1887
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Heinrich Hertz observed electromagnetic waves in this year
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Electromagnetic Spectrum
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Term used to describe the entire range of electromagnetic radiations arranged in order of their frequency and wavelengths
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3x10^8 m/s
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The Speed of Light
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Electromagnetic Wave
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This type of wave consists of electric and magnetic components
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Radio Waves
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Longest of electromagnetic waves
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Heinrich Hertz
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He discovered radio waves in 1887
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Long waves, Medium Waves, Very High Frequency Waves (VHF), and Ultra High Frequency Waves (UHF)
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Types of Radio waves
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Medium Waves
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used in AM stations
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VHF waves
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used in PM stations
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UHF waves
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Used in police radio communications, military aircraft, and tv transmissions
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Microwaves
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Extremely High frequency radio waves. Easily absorbed my water molecules.
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James Clerk Maxwell
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He was credited for discovering microwaves in 1864
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Infrared Rays
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These rays have longer wavelengths than red.
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Sir William Herschel
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He identified Infrared waves about 1800
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Heat Waves
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Another term for Infrared rays
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Visible Light
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Part of the EMS visible to our eye's retina
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Johann Wilhelm Ritter
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Discovered Ultraviolet Rays
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The Sun
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Major source of Ultraviolet rays
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Vitamin D
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UV rays are good sources of ___________
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Wilhelm Conrad Roentgen
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He accidentally discovered X-rays
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Gamma Rays
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These rays can cause cancer and even mutation
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Cobalt-60 and Cesium-137
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The are radioactive materials giving off Gamma rays
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Radiotherapy
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Uses Gamma rays to destroy cancer cells
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Paul Villard
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He discovered Gamma rays in 1900
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Cosmic Rays
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These rays come from outer space but are mostly stopped by the earth's atmosphere
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Wavelength
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Distance between two successive points in a wave that are in phase with each other.
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Reflection, refraction, diffraction,interference, and Doppler Effect
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Properties all waves exhibit
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Polarization
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Additional wave property demonstrated by transverse waves
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Refraction
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Change in direction and velocity of a wave when it hits a surface
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Reflection
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The bouncing back of a wave when it hits a surface
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Diffraction
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Change in direction of a wave when it enters an opening
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Interference
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Combination of waves passing the same medium at the same time
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Doppler Effect
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This is the apparent change in the frequency of a source of wave due to motion of the source and/or the observer.
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Polarization
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This is a test to determine whether a wave is transverse or not.
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Huygens' Principle
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States that every point on a wave can act as a new source of waves
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Superposition Principle
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States that when two or more waves travel simultaneously in the same medium, each wave will proceed independently of the others.
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Standing Waves
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A special case of interference happens between two waves of the same frequency,same amplitude,in phase but traveling in opposite directions.
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Nodes
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These are regions where particles of the medium are not displaced from the equilibrium position
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Antinodes
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These are regions of maximum displacement from an equilibrium position.
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Christian Doppler
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He discovered the Doppler Effect
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1842
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The year Christian Doppler discovered the Doppler Effect.
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Doppler Shift
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Doppler Effect in light is more commonly called _____________
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Radio Detection and Ranging
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The acronym of Radar
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Doppler Radar
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Used in weather forecasting and detecting planes
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Light Detection and Ranging
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The acronym of LIDAR
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