Transcript Waves

Waves
a disturbance that transmits energy through matter or
empty space
transverse waves
 waves in which the particles
vibrate in an up-and-down
motion
 highest point is the crest
 lowest point is the trough
 electromagnetic waves do not
travel along a medium, but all
are transverse waves because
vibrations are perpendicular to
motion.
longitudinal waves
 wave that particles vibrate back
and forth along the path that the
wave moves.
 compression – particles are
crowded together
 rarefaction – particles are spread
apart.
 Sound waves travel along
longitudinal waves
Figure 6 Comparing Longitudinal and
Transverse Waves
pg. 606
Amplitude pg. 608
the maximum distance that
the particles of a wave’s
medium vibrate from their
rest position
Measuring Waves pg. 609
 wavelength – the distance
from any point on a wave to
an identical point on the
next wave
 frequency – the number of
waves produced in a given
amount of time
 How to measure sound
wave frequency
 noaa - measuring waves
Wave interactions
reflection
refraction
 the bouncing back of a wave of
light, sound, or heat when the
wave hits a surface that it does
not go through
 the bending of a wave as the
wave passes between two
substances in which the speed
of the wave differs
 reflection vs. refraction
 One smart kid
 Bill Nye light bending
Answer this…..
 Name two wave interactions that can occur when a
wave encounters a barrier.