Sound and Light Crossword Puzzle

QUESTIONS LIST:

• wave speed : the speed of a wave in any given medium e.g. the speed of sound in air.
• pitch : how high or low pitched a sound is, indicated by higher or lower frequency
• longitudinal : a wave in which the medium vibrates in the same direction as the direction of propagation.
• absorption : when wave energy is taken in by a substance
• transverse : a wave in which the medium vibrates at right angles to the direction of its propagation.
• amplitude : the height of a wave from the equilibrium to the peak or trough.
• rarefaction : a region of a longitudinal wave in which the waves are furthest apart.
• trough : the lowest point on a wave
• reflection : the change of direction of a wave without passing through a boundary
• oscilloscope : a machine which displays a graph of an oscillation, e.g. the electrical signal picked up by a microphone.
• frequency : the number of waves per second.
• microphone : converts a sound wave into an electrical signal
• hertz : the unit of frequency.
• loudspeaker : converts an electrical signal into a sound wave
• compression : a region in a longitudinal wave in which the compression are closer together.
• vacuum : an absence of any particles
• equilibrium line : the horizontal line running through the middle of the wave, a point of zero displacement.
• ultrasound : a sound wave with a frequency higher than 20,000 hertz
• medium : the material for which a wave is travelling
• wavelength : the length of a single wave measured from peak to peak or trough to trough etc.
• peak : the highest point on a wave
• transmission : when a wave passes through a substance