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sound and light wave

QuestionAnswer
What type of wave is a sound wave? mechanical
Sound waves must have a __________ to travel. medium
Sound waves cannot travel through a _____________. vacuum
Waves move through an object vibrations
Sound waves travel _________ through a solid. Why? faster; The particles are touching, so it is easier for one particle to make the next one vibrate.
Waves bouncing off a surface reflection
Sound is repeated back echo
Repeated echo reverberation
Change in direction of a wave or bending of a wave as the wave passes from one medium to another with a different density refraction
Refraction is caused by the change in a wave’s __________. speed
When a material takes in energy absorption
Energy is transformed into __________ when it is absorbed. heat
Waves bend around an obstacle or spread out after passing through a small opening diffraction
Wave hits small segments of a rough surface and reflect in many different directions scattering
Light waves are ___________ waves. electromagnetic
Light waves do not require a ________. medium
Material that allows no light to pass through opaque
Material that allows some light to pass through translucent
Material that allows almost all light to pass through transparent
What happens to light when it strikes an object depends on the _____ of the object. material
What causes the beam of a light to appear dim? Particles in the air absorb some of the light energy.
What allows us to see an object? Light waves reflecting off an object.
Law of Reflection Angle of reflection = angle of incidence
Line perpendicular to the reflected surface Normal line I
Amount a wave diffracts depends on its wavelength and the size of the barrier or opening
Why do light waves not diffract very much around an object? Wavelengths are small.
Gives the illusion of a bent straw in a clear glass of water refraction
Light bends more when its frequency is _________. greater
Longest wavelength red
Shortest wavelength violet
Color with greatest angle of refraction violet
Color with smallest angle of refraction red
Why do leaves on a tree appear green? The are absorbing all colors of light but green.
What are you seeing when you see color? The frequency of light being reflected
Causes colors to separate when a white light hits a prism refraction
Primary colors of light Red, blue, green
Light travels slowest through _______. gas
Pitch is determined by ______. Frequency (higher pitch = higher frequency; lower pitch = lower frequency)
amplitude How loud something is
Created by: mal14
 

 



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