Waves
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| wave | a rhythmic disturbance that carries energy; transfer energy from one place to another
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| transverse waves | matter moves at right angles to the direction the wave travels (water); source moves up and down, coils move up and down
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| compressional waves/longitudinal waves | matter vibrates in the same direction as the wave (sound wave); source moves left and right, coils move left and right
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| parts of a wave | crest, trough, wavelength, amplitude
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| wavelength | the distance between a point on one wave and the identical point on the next wave
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| amplitude | the greatest distance a wave rises or falls from its rest position (or height of the wave)
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| rest position | the position of the wave before it is disturbed; represented by the dotted line
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| crest | highest point in a transverse wave
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| trough | lowest point in a transverse wave
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| frequency | is a count of the number of waves that pass a given point in one second
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| Hertz | the unit for the frequency of a wave
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| high frequency | shorter wavelength
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| low frequency | longer wavelength
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| formula for finding velocity (speed) of a wave | velocity=wavelength x frequency
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| period of a wave | the amount of time a particle on the wave would take to complete one wavelength
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| two things needed for sound to be produced | a vibration (Tuning forks) and a medium (material) for the vibration to travel through
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| characteristics of sound waves | compressional waves, expand outward in all directions, need a medium to travel (cannot travel through a vacuum)
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| loudness of sound depends on | the amplitude of the wave
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| decibels | unit used to measure volume
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| pitch | how high or low a sound is heard by our ears; depends on how many times the air vibrates in one second
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| speed of sound depends on | the density and elasticity of the medium it is traveling through
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| sound travels fastest through | dense solids with little elasticity
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| sound travels slowest through | gases that are easy to compress
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| The speed of sound depends on | temperature and density
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| We see different colors because of | the wavelength of light that is reflected
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| white light is | a combination of all colors being reflected
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| black is | the absorption of all colors
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| red absorbs all wavelengths EXCEPT | red
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| radiation | the transfer of energy by the Electromagnetic Spectrum
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| electromagnetic waves are | transverse waves, able to carry energy through "empty space", arranged in the spectrum by their different wavelengths
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| radio waves have | the longest wavelength and lowest frequency
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| infrared radiation is produced | by all hot objects
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| visible light is the only part of the electromagnetic spectrum that | can be detected by our eyes
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| ultraviolet radiation can | kill living cells
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| X rays and gamma rays have the | shortest wavelength and highest frequency
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| This color has the longest wavelength so it blends the least. | Red
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| This color has the shortest wavelength so it blends the most. | Violet
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| concave lens | makes objects look smaller
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| convex lens | flipped objects upside down or make objects larger
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| concave mirror | makes the image larger of zoomed in
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| convex mirror | makes the image look smaller or farther away
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| transparent | an object that lets ALL light pass through it.
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| translucent | an object that lets SOME light pass through it
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| opaque | an object that lets NO light pass through it
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| changes in wave patterns result from | hitting a boundary, changing the medium in which they travel, collisions with other waves
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| when light passes from one type of material to another, 3 things may happen | reflection, refraction, diffraction
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| reflection | the bouncing back of a wave when it hits a boundary
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| refraction | the bending of light due to a change in the speed
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| diffraction | the bending of waves around a barrier that blocks their path
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| lenses | a transparent piece of glass or plastic that refracts light
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| Light passing through a convex lens _______ and _______ closer making an object look larger | bends and focuses
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| Light passing through a concave lens bends and focuses ____________ away making an object look smaller | farther
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| A glass prism will _______________ or bend light. | refract
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Created by:
osterman
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