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Physics A > Unit 4 > Flashcards

Unit 4 Flashcards

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1
Q

amplitude

A

the maximum displacement from an equilibrium position

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2
Q

antinode

A

in a wave pattern the region of maximum wave motion

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3
Q

beats

A

series of alternating reinforcements and cancellations produced by the interference of the waves of different frequencies

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4
Q

condensation

A

a region of compression (high pressure, or density) in a longitudinal wave

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5
Q

constructive interference

A

the effect produced where the crests or the trough of two waves cross, yielding increased amplitude

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6
Q

crest

A

the highest part of a wave

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7
Q

criticle angle

A

the minimum angle of incidence that produces total internal reflection

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8
Q

destructive intreference

A

the effect produced when the crest of one wave and trough of another wave coincide, yielding decreased amplitude

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9
Q

diffraction

A

the bending of a wave in a homogeneous medium around obstacles or through a narrow opening

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10
Q

doppler effect

A

the apparent change in frequency perceived when the source and observer are approaching or receding from each other

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11
Q

frequency

A

the number of waves (vibrations, revolutions, or cycles) that pass a given point per unit time

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12
Q

incident wave

A

the wave that strikes a boundary; the original wave

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13
Q

interference

A

the superposition of two periodic waves, producing regions of constructive and destructive interference

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14
Q

longitudinal wave

A

wave in which the pulses oscillate parallel to the direction of the wave path (see compression wave)

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15
Q

node

A

wave in which the pulses oscillate parallel to the direction of the wave path (see compression wave)

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16
Q

nonrecurrent wave

A

a wave of short duration; a nonrepetitive pulse

17
Q

period

A

the time required for a complete wave to pass a given point; reciprocal of frequency

18
Q

periodic wave

A

a regular succession of pulses or identical disturbances

19
Q

pulse

A

any regular, measured beat; specifically, a nonrecurrent or nonrepetitive wave

20
Q

rarefaction

A

any regular, measured beat; specifically, a nonrecurrent or nonrepetitive wave

21
Q

refelcted wave

A

the wave that bounces off a boundary into the same medium

22
Q

reflection

A

the bouncing of a wave off a boundary

23
Q

refracted wave

A

the wave that is bent as it passes into a different medium

24
Q

refraction

A

the bending of a wave as it passes from one medium into another, or as it passes through a non-uniform medium

25
Q

resonance

A

the vibration of an object as its natural frequency caused by a force or wave of the same frequency or multiple thereof

26
Q

shock wave

A

the cone-shaped wave made by a particle moving faster than the speed of a wave in that medium

27
Q

standing wave

A

the pattern produced by reflecting a wave back on itself

28
Q

superposition

A

the way in which two waves combine

29
Q

torsional wave

A

a wave in which the pulse oscillates around the equilibrium position in a rotational motion

30
Q

total internal reflection

A

the effect produced when a wave incident at or above the critical angle in a low velocity medium cannot be refracted into a high velocity medium

31
Q

transmitted wave

A

the wave that travels from one medium to another

32
Q

transmission

A

the passing of a wave from one medium into another

33
Q

transverse wave

A

a wave in which the pulse oscillates perpendicular to the direction of the wavepath

34
Q

trough

A

the lowest part of a wave

35
Q

velocity

A

the rate at which displacement is covered in a given period of time; d\t

36
Q

wave

A

a disturbance in a medium that transfers energy without transferring matter

37
Q

wavelength

A

distance between identical parts of a wave

Physics A (4 decks)

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