5.3 - Wave Behaviour & Practice Flashcards
When two or more waves pass through
each other, we have _______. The
waves will interact and in effect, either
cancel each other out or make each
other bigger.
Interference
The principle of superposition 🡪
When two or more waves move through
each other, the final displacement for
any point is found by adding the
displacements of the waves at that point
together.
Constructive Interference:
When the
waves push the medium in the same
direction.
Destructive Interference:
When the
waves push the medium in opposite
directions
When a crest and a trough of equal
magnitude hit each other, there is a point
that doesn’t move. This point is called
the _____ ______ or also a _______.
nodal point; node
When a wave moves through an opening
(hole) it will _______________.
spread out or bend
Waves experience a large amount of diffraction
when they move through an opening
_____ than their ________.
smaller; wavelength
Only a small amount of diffraction happens when
the move through an opening ______ than
their wavelength.
bigger
There is no change in ______ or
__________ during diffraction.
frequency; wavelength
A wave will change speed when it enters
a new medium, but the _______ will
stay the same.
frequency
Refraction is when the wave
changes ______ because part of it
slows down sooner than the rest of it
since the wave is entering a new
medium.
direction
In sound, constructive interference makes the
amplitude of the wave ________. This make
the sound intensity increase, and also the
loudness increase.
increase
Destructive interference makes the amplitude
of the wave ______. This makes the sound
intensity decrease, and the loudness
decrease.
decrease
In sound, a nodal point means we have
______ ________
total silence.
