Physics 7 Flashcards
Wave Interference
Two or more waves can exist in the same area at the same time
Waves at boundaries btwn mediums
The speed of a mechanical wave does not depend upon the
amplitude (V = λf)
The speed depends upon the property of the medr um. Ex speed in water depends upon depth.
smaller and larger waves travel at the __ speed
same
larger waves have ____ energy
more
the incident wave continues at the same frequency and is called the
transmitted wave
the wave that is returned is called the
reflected wave
Superposition of waves
Each different wave affects the medium independantly
Principle of Superposition
The displacement of a medium caused by two or more waves is the Algebraic sum of the displacement caused by the individual waves
The result of superposition of two or more waves is called
Interference
types of interference
constructive
destructive
Principle of Superposition
- two or more waves
-algebraic sum of waves -constructive or deconstructive
Constructive Interference
-When two or more waves are both the same (crest/crest or trough/trough)
- the resulting wave is a wave with a longer amplitude than any of the individual waves
Destructive Interference
-When two or more waves have different orientations (crest/trough) meet
- the resulting wave has a smaller amplitude than any of the individual waves
- If they are the exact same size the resulting displacement is zero (for that istant in time)
waves pass through each other ____
Unchanged. Unequal amplitudes do not completely destroy
the wave
