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Sound and Light

Chapter 14 - Sound and Light

sound a form of energy that travels in waves through solids, liquids and gases.
compression the part of a wave where the particles are bunched together
transverse wave a wave in which the particles move at a right angle to the direction that the wave travels, much like a jump rope that has been flicked
longitudinal wave a wave in which the particles move parallel to the direction the wave travels, much like a slinky that has been pulled and released
frequency the number of times a wave makes a complete cycle in one second
wavelength the distance between a point on a wave and a similar point on the next wave
echo when a sound wave travels and hits a hard, smooth surface, the wave reflects or bounces back
pitch what makes a sound seem high or low
high pitch high frequency sounds with short wavelengths have this kind of pitch
low pitch low frequency sounds with long wavelengths have this kind of pitch
vibrations motions that cause sound waves
electromagnetic spectrum the range of all light waves, including visible light and all other forms of light waves
visible light frequencies red, orange, yellow, green, blue, violet
reflection occurs when light rays bounce from a surface back to our eyes
absorption occurs when an object takes in a light wave
transparent material that lets light rays pass through completely
translucent material that lets some light rays pass through but scatters others
opaque material that does not let any light rays pass through
refraction bending of a light wave caused by the change of speed that occurs when the wave passes from one medium into another
convex lens a lens that is thicker in the middle than at the edges and makes things appear larger
concave lens a lens that is thinner in the middle than at the edges and makes things appear smaller
Created by: Counter