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Interference

Total questions: 20

Worksheet time: 18mins

Name
Class
Date
1.

What type of interference is represented in this diagram?

a)

Constructive

b)

Destructive

2.

What type of interference is represented in the diagram?

a)

Constructive

b)

Destructive

3.

What type of interference do noise cancelling headphones use?

a)

Constructive Interference

b)

Destructive Interference

4.

Sound waves in musical instruments or tubes create standing waves that enhance which type of interference to make louder sounds?

a)

Constructive

b)

Destructive

5.

True or False? Two waves cannot exist in the same space or in the same medium at the same time.

a)

True

b)

False

6.

When a compression interferes with another compression, what occurs?

a)

They counteract and the wave stops.

b)

They combine to create a larger compression.

c)

They combine to create a rarefaction.

d)

None of the above.

7.

When a crest and a trough interfere, what occurs?

a)

They combine to create a higher amplitude wave.

b)

They counteract and the wave either lessens or stops completely.

c)

The wave changes into a longitudinal wave.

8.

If waves overlap and are in phase, how will that affect the resultant wave?

a)

Decrease the amplitude

b)

Increase the amplitude

c)

Decrease the frequency

d)

Increase the frequency

9.

What is the height of a wave from equilibrium?

a)

Amplitude

b)

Interference

c)

Wavelength

d)

Sound

10.

What will be the result after these two waves overlap?

a)

A taller wave

b)

A shorter wave

c)

A wave with no amplitude

d)

3 waves

11.
Two longitudinal waves overlap.  Compressions overlap with compressions.  Rarefactions overlap with rarefactions.  The waves are
a)
In-phase
b)
Out-of-phase
c)
In-synchronicity
d)
Out-of-synchronicity
12.
Two longitudinal waves overlap.  Compressions overlap with rarefactions.  The waves are
a)
In-phase
b)
Out-of-phase
c)
In-synchronicity
d)
Out-of-synchronicity
13.

Look at the diagram. At which positions will the overlapping waves have the most constructive interference?

a)

Positions #1 & #5

b)

Positions #2 & #3

c)

Positions #3 & #4

d)

Positions #4 & #5

14.

Look at the diagram. At which positions will the overlapping waves have the most destructive interference?

a)

Positions #1 & #5

b)

Positions #2 & #3

c)

Positions #3 & #4

d)

Positions #4 & #5

15.

Review: What is it called when a wave bounces off an object?

a)

Reflection

b)

Refraction

c)

Diffraction

16.

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

a)

It is constructive interference with twice the amplitude

b)

It is destructive interference with zero amplitude

c)

It is constructive interference with slightly greater amplitude

d)

It is constructive interference with the negative amplitude

e)

The standing wave is produced

17.

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?

a)

It is constructive interference with twice the amplitude

b)

It is destructive interference with zero amplitude

c)

It is constructive interference with slightly greater amplitude

d)

It is constructive interference with the negative amplitude

e)

The standing wave is produced

18.

Which of the following is the speed of a wave traveling with a wavelength λ, frequency f, and period T?

a)

v=λfv=\frac{\lambda}{f}

b)

v=fλv=\frac{f}{\lambda}

c)

v=λfv=\lambda\cdot f

d)

v=fTv=f\cdot T

e)

v=fTv=\frac{f}{T}

19.

What is a general definition of wave interference?

a)

When a wave bounces off an object

b)

When more than on wave meet and interact in the same medium

c)

When a wave bends around a corner

d)

When a wave creates static

20.

When two waves meet and create a smaller wave

a)

Constructive

b)

Destructive