25 terms

scienc

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wave
a disturbance that transfers energy from one place to another
medium
the material through which a wave travels through
longitudinal wave
particles move back and forth in the same direction that the wave travels, parallel
transverse wave
particles move perpendicularly to the direction the wave travels
mechanical wave
a wave that requires a medium through which to travel
electromagnetic wave
a disturbance in electric and magnetic fields
amplitude
a measure of how far the particles in the medium move away from their normal rest position
wavelength
the distance from any point on a wave to an identical point on the next wave
wave period
the time required for one cycle
frequency
how many cycles occur in an amount of time
hertz
what frequency is expressed in
wave speed
the speed at which a wave travels
echo
a reflected sound wave
interference
when two or more waves overlap and combine to form one wave
resonance
when a sound wave matches the natural frequency of an object and causes the object to vibrate
echolocation
the use of echoes to find objects
ultrasound
sound waves that have frequencies higher than 20,000 hz
sonar
a system that uses sound waves to determine the location of objects or to communicate
transparent
matter that transmits light
translucent
materials transmit light but do not let the light travel straight through
opaque
materials do not let any light pass through them
absorption
the transfer of light energy to matter
reflection
the bouncing of light off a surface
refraction
the change in direction of a wave as it passes from one medium into another at an angle
scattering
when light is sent in many directions as it passes through a medium