wave interactions chapter 11.3 science spectrum. reflection reflection is simply the bouncing back...
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Diffraction Diffraction is the bending of a wave as it passes an edge or an opening. Diffraction is the bending of a wave as it passes an edge or an opening. Example: When water waves goes through an opening or passing through an obstacle. Example: When water waves goes through an opening or passing through an obstacle. /Diffraction2.htm /Diffraction2.htm /Diffraction2.htm /Diffraction2.htmTRANSCRIPT
Wave InteractionsWave Interactions
Chapter 11.3Chapter 11.3Science SpectrumScience Spectrum
ReflectionReflection Reflection is simply the Reflection is simply the
bouncing back of a wave as it bouncing back of a wave as it meets a surface or boundary.meets a surface or boundary.
Examples: Echoes and lightExamples: Echoes and light
DiffractionDiffraction Diffraction is the bending of a wave Diffraction is the bending of a wave
as it passes an edge or an opening.as it passes an edge or an opening. Example: When water waves goes Example: When water waves goes
through an opening or passing through an opening or passing through an obstacle.through an obstacle.
http://www.ngsir.netfirms.com/englishttp://www.ngsir.netfirms.com/englishhtm/Diffraction2.htmhhtm/Diffraction2.htm
RefractionRefraction Refraction is the Refraction is the
bending of waves as bending of waves as they pass from one they pass from one medium to another.medium to another.
Example: An object Example: An object appears bent when appears bent when part of it is part of it is submerged in water.submerged in water.
InterferenceInterference The combination of two or more The combination of two or more
waves that exist in the same place at waves that exist in the same place at the same time.the same time.
There are two types of interference.There are two types of interference. Constructive InterferenceConstructive Interference Destructive InterferenceDestructive Interference
Constructive InterferenceConstructive Interference Any interference in which Any interference in which
waves combine so that the waves combine so that the resulting wave is bigger than resulting wave is bigger than the original waves.the original waves.
Two Crest adds up to one large Two Crest adds up to one large crestcrest
Constructive Constructive InterferenceInterference
Two Troughs adds up to one large Two Troughs adds up to one large troughtrough
Destructive InterferenceDestructive Interference Any interference in which Any interference in which
waves combine so that the waves combine so that the resulting wave is smaller than resulting wave is smaller than the largest of the original the largest of the original waves.waves.
Destructive InterferenceDestructive Interference
A crest and a trough cancels each other out.A crest and a trough cancels each other out.
After InterferenceAfter Interference
After constructive or destructive interference, After constructive or destructive interference, the waves will resume its normal form.the waves will resume its normal form.
Practice Problem #1Practice Problem #1 Determine Determine
whether the whether the interference interference between the between the waves is waves is constructiveconstructive or or destructivedestructive depending on the depending on the part of the wave.part of the wave.
Answer to #1Answer to #1
Constructive Interference Constructive Interference G, J, M, NG, J, M, N
Destructive Interference Destructive Interference H, I , K, L, OH, I , K, L, O
Practice Problem #2Practice Problem #2
Twin water bugs Jimminy and Johnny are Twin water bugs Jimminy and Johnny are both creating a series of circular waves both creating a series of circular waves by jiggling their legs in the water. The by jiggling their legs in the water. The waves undergo interference and create waves undergo interference and create the pattern represented in the diagram at the pattern represented in the diagram at the top. The thick lines in the diagram the top. The thick lines in the diagram represent wave crests and the thin lines represent wave crests and the thin lines represent wave troughs. Several of represent wave troughs. Several of positions in the water are labeled with a positions in the water are labeled with a letter. Categorize each labeled position as letter. Categorize each labeled position as being a position where either being a position where either constructiveconstructive or or destructivedestructive interference occurs. interference occurs.
Practice Problem #2Practice Problem #2Thin lines = troughThin lines = trough Thick lines = Thick lines =
crestcrest
Answer to #2Answer to #2 Constructive InterferenceConstructive Interference
A & BA & B
Destructive InterferenceDestructive InterferenceC, D, E, & FC, D, E, & F