Interference Waves

Reflection, Refraction, and Diffraction

​​states that when a wave reflects off a surface, the angle of incidence is equal to the angle of reflection

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When a wave encounters an impassable ​barrier or obstacle

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​Law of Reflection

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Multiple Choice

The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-

• absorbed
• stopped
• reflected
• refracted

a change in direction of waves when they pass through different mediums

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Refraction

Multiple Choice

A student placed a pencil in a cup of water.  The pencil appears broken because light-

• always travels in a straight line
• bends when it passes through water
• makes the water in the glass evaporate
• reflects the pencil on the water's surface

Change in waves as they pass around a barrier or through ​an opening

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Diffraction

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Multiple Choice

The diagram shows a series of wave fronts approaching an opening in a barrier. Point P is located on the opposite side of the barrier. The wave fronts reach point P as a result of

• resonance

• refraction

• reflection

• diffraction

Behavior of Waves part 2

By Stacy King

Interference

when two waves meet while traveling along the same medium​

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Interference

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interference that occurs at any location along the medium where the two interfering waves have a displacement in the same direction​

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Constructive

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Multiple Choice

What type of interference is being shown in the picture?

• Constructive

• Destructive

Multiple Choice

When 2 waves meet and create a bigger wave

• Constructive Interference

• Destructive Interference

interference that occurs at any location along the medium where the two interfering waves have a displacement in the opposite direction​

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Destructive

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Multiple Choice

What type of interference is occurring in the picture?

• Constructive

• Destructive

Multiple Choice

When two waves meet and create a smaller wave

• Constructive

• Destructive

​When two waves interfere, the resulting displacement of the medium at any location is the algebraic sum of the displacements of the individual waves at that same location​

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Principal of Superposition

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Constructive

displacement + displacement ​

Destructive

​Displacement - Displacement

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Principal of Superposition

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Multiple Choice

What will be the result after these two waves overlap?

• A taller wave

• A shorter wave

• A wave with no amplitude

• 3 waves

Multiple Choice

Two wave pulses with equal positive amplitudes travel on a cord approaching each other. What is the result of the oscillations when the pulses reach the same point?

• It is constructive interference with twice the amplitude

• It is destructive interference with zero amplitude

• It is constructive interference with slightly greater amplitude

• It is constructive interference with the negative amplitude

• The standing wave is produced

Wave Superposition Interactive

​click here

received frequency of a source to differ from the sent frequency

• if there is motion that is increasing or decreasing the distance between the source and the receiver​​

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Doppler Effect

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