Waves And Three Dynamic Questions Flashcards
What is a wave
A disturbance that moved from one place to another in a medium, transferring energy
As the amplitude of a wave increases…
The energy Transferred increases
What are nodes
They are points of zero disturbance
What are antinodes
Halfway between nodes are points of maximum disturbance
The distance between nodes is equal to
Half a wavelength
Two waves are coherent if they have
A constant phase difference
What makes a destructive interference
The phase difference between two overlapping coherent waves is pi
When x=1/2 wavelength and is equivalent to a crest superimposed on a trough
A wave is travelling in glass what happens to the wavelength and why
The wavelength decreases due to refraction
A light wave in air reflecting off glass undergoes a phase change, what is the phase change of?
Pi
When a light wave in air is reflecting off of glass and undergoes a phase change of pi, What also is different as it’s reflected
A crest reflects as a trough
What makes a phase change of pi occur
When light is reflected from a lower to higher refractive index medium
A light wave in glass reflects back into glass, what can be said about the phase change
There is no change in phase
As a crest meets a crest, what can be said about the phase change
There is no phase change
As light reflects from an interface with a lower optical density medium, what can be said about the phase change
There is no phase change
Does the incident wave have a higher or lower amplitude than the reflected and refracted waves?
Higher
