topic 6 waves Flashcards
what are the two types of waves
transverse
longitudinal
what is a transverse wave
a wave for which the oscillations are perpendicular to the direction of energy transfer
what is a longitudinal wave
a wave for which the oscillations are parallel to the direction of energy transfer
2 examples of transverse waves
electromagnetic and seismic s waves
2 examples of longitudinal waves
sound waves and seismic p waves
WHAT IS THE WAVES AMPLITUDE
the maximum height / displacement of a wave from its original point
what is wavelength
distance from a point on a wave to the same position on the adjacent of the wave
usually points of a peak or trough to trough
what is the frequency of waves
the number of waves that pass per second
units for frequency
Hz, Hertz
what does it mean when a frequency is 200Hz
200 waves pass per second
what is wave speed
the speed which the wave moves or at which energy is transferred through a medium
what does a wave transfer
energy
give equation for wave speed
frequency x wavelength
what word is used when a wave bounces off a surface
reflection
how do sound waves travel through a solid
the particles in the solid vibrate and transfer ke through the material
what is the frequency range of human hearing
20 hz - 20kHz
what are ultrasound waves
waves which have a frequency higher than the upper limit of human hearing (20kHz)
what natural event causes seismic waves to be produced? what type of waves are produced
earthquakes
they produce p waves and s waves
difference of p waves and s waves and what they can travel through
p waves travel through solids and liquids
s waves only travel through solids not liquids
what technique is used to detect object deep in water depth
echo sounding
high frequency sound waves are emitted and reflected and detected
tome difference between going down and back up
