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24 Waves, Sound & Light
Question | Answer |
---|---|
wave | a disturbance that moves through matter or space |
transverse wave | a mechanical wave that causes particles in matter to move back and forth at right angles to the direction in which the wave travels |
compressional wave | a mechanical wave that causes particles in matter to move back and forth along the same direction in which the wave travels |
wavelength | the distance between a point on a wave and the nearest point moving with the same speed and direction |
frequency | the number of wavelengths that pass by a point each second |
law of reflection | the angle that the incoming wave makes with the normal equals the angle that the outgoing wave makes with the normal |
refraction | the change in direction of a wave when it changes speed as it travels from one material to another |
diffraction | the bending of waves around an object |
intensity | the amount of energy that a wave carries past a certain area each second |
pitch | the human perception of the frequency of sound (how high or high low a sound is) |
reverberation | repeated echoes |
electromagnetic waves | waves that can travel through natter or through empty space |
electromagnetic spectrum | the complete range of electromagmetic wave frequencies and wavelengths |
infrared waves | have wavelengths between .001 meters and 700 billionths of a meter |
ultraviolet waves | have wavelengths between 400 billionths and 10 billionths of a meter |
spectrum | a range of values or properties |
perception | a recognition, sense, or understanding of something |
density | the mass per cubic meter of a substance |