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Physics > Waves > Flashcards

Waves Flashcards

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1
Q

Diagram I shows a glass tube containing undisturbed air molecules. Diagram II shows the same glass tube when a wave passes through it. Which type of wave produced the disturbance shown in Diagram II?

A

longitudnal

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2
Q

A _____ wave travels through a medium as a series of compressions and rarefactions.

A

longitudnal

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3
Q

If you want to increase the wavelength of the waves in a rope, should you shake it at a higher frequency or at a lower frequency?

A

lower frequency

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4
Q

A wave that is produced by a single motion that does not repeat is a _____ wave.

A

pulse

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5
Q

A wave pattern on a stretched string appears to be stationary. This wave pattern is an example of a

A

standing wave

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6
Q

A sound wave is an example of a(n) _____ wave.

A

longitudnal

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7
Q

A represents the wave’s

A

rarefaction

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8
Q

B represents the wave’s

A

compression

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9
Q

C represents the wave’s

A

wavelength

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10
Q

The amplitude of a mechanical wave determines how much _____ the wave transfers per unit time.

A

energy or work

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11
Q

speed

A

v

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12
Q

frequency

A

f

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13
Q

period

A

T

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14
Q

The material through which a mechanical wave travels is

A

medium

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15
Q

Does the medium in which a wave travels move along with the wave itself?

A

no

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16
Q

what are the two basic types of waves?

A

Transverse and longitudnal

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17
Q

A wave is passing through a uniform medium. As the frequency of this wave increases, its wavelength

A

decreases

18
Q

The distance between two troughs of a transverse wave is the wave’s

A

wavelength

19
Q

Which of the following usually transmits energy without transferring matter?

A

wave

20
Q

A type of wave that vibrates in a direction perpendicular to the direction of wave motion.

A

transverse

21
Q

A type of wave that vibrates in a direction parallel to the direction of wave motion.

A

longitudnal

22
Q

Refer to the diagram below. Between which, two points is the wave frequency the highest?

A

point 2 and 3

23
Q

waves may bend around a barrier

A

diffraction

24
Q

the apparent change of pitch due to movement of the source or observer

A

doppler shift

25
Q

waves that return to their medium after hitting a surface

A

reflection

26
Q

waves that pass through a medium bend due to a change in speed

A

refraction

27
Q

waves in the same space at the same time

A

superposition

28
Q

the combination of two or more electromagnetic wave forms to form a resultant wave in which the displacement is either reinforced or canceled

A

interference

29
Q

In a standing wave on a vibrating string, a point that appears to remain stationary is a(n)

A

node

30
Q

When two waves having equal amplitudes, but displacements in opposite directions meet, _____ occurs.

A

destructive interference

31
Q

Two waves meet and interfere constructively. Which one of the following factors increases?

A

amplitude

32
Q

The diagram above represents two pulse waves moving toward each other through a medium with equal, but opposite amplitudes. The two waves will exactly coincide (pass through each other) when they reach point A. At point A, the amplitude of the combined waves will be

A

zero

33
Q

Which of the following characteristics of waves (energy) makes them fundamentally different than particles (matter)?

A

superposition

34
Q

The diagram above represents a certain standing wave on a vibrating string. This standing wave has

A

4 nodes 3 antidotes

35
Q

A small vibrating object on the surface of a ripple tank is the source of waves of frequency 20 Hz and speed 60 cm/s. If the source S is moving to the right (as shown above), with speed 20 m/s, at which of the labeled points will the frequency measured by a stationary observer be greatest?

A

C

36
Q

Diffraction of waves occurs when a wave encounters or responds to which of the following?

I. obstacle
II. opening
III. sharp edge
IV. another wave of equal wavelength

A

I, II, III

37
Q

A represents the

A

incident wave

38
Q

B represents the

A

reflected wave

39
Q

C represents the

A

refracted wave

40
Q

A wave refracts when it enters a new medium and changes direction. Why does this happen?

A

the speed changes

41
Q

When two transverse waves traveling through a medium meet and exactly coincide (pass through each other), the resulting displacement of the medium

A

Is the sum of the displacements of each wave

Physics (9 decks)

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