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PHYS1030 > Waves 1.1 > Flashcards

Waves 1.1 Flashcards

(42 cards)

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1
Q

Wave

A

A means of transferring energy from one point to another through a medium, without transferring matter

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2
Q

Wave

A

A means of transferring energy from one point to another through a medium, without transferring matter

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3
Q

Periodic/Progressive Wave

A

A wave which moves from one point to another point

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4
Q

Wave Pulse

A

A short wave form that transmits a burst of energy through a medium

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5
Q

Wave Train

A

A repeated wave form which transmits energy continuously through a medium

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6
Q

Wave Classification

A
  1. Medium or No Medium

2. Nature of Vibration in Medium

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7
Q

Medium or No Medium

A
  • Mechanical waves

- Electromagnetic waves

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8
Q

Nature of Vibration in Medium

A
  • Transverse waves

- Longitudinal waves

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9
Q

Mechanical Waves

A

Waves that require a physical medium for their propagation

e.g. sound and water waves, waves in strings

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10
Q

Electromagnetic Waves

A

Waves that do not require a particle medium and may consist of oscillating transverse electric and magnetic fields which vibrate mutually at right angles to their direction of propagation
(e.g. light waves)

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11
Q

Transverse Waves

A

Particles in the medium through which a transverse wave is passing oscillate at 90 to the direction of motion of the wave
(e.g. water waves and all electromagnetic waves, light waves and waves in strings)

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12
Q

Longitudinal Waves

A

Particles in the medium through which a longitudinal wave is passing vibrate parallel to the direction of motion of the wave

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13
Q

Wavelength

A

The distance between two successive points in a phase

SI unit is metre (m)

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14
Q

Frequency

A
  • The number of times per second that the particles of the medium make a complete oscillation
  • Frequency can also be thought of as the number of wave crests that pass a particular point in a second
    Unit is Hz
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15
Q

Amplitude

A

The maximum displacement of a particle from its mean position
- Is an indication of the energy content of the wave

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16
Q

Phase

A

Particles in a medium are in phase if they are undergoing identical motion (have the same velocity and displacement)

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17
Q

Angular Phase Difference

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A

Motion of particles in a medium may be described in terms of their angular displacement

18
Q

Speed of Sound

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A

Speed of sound related to how quickly energy can be transferred between particles in medium

  • Density (how close particles are to each other)
  • Elasticity (forces that exist between particles)

Speed increases…

  • With increase in temperature
  • Gas
19
Q

Speed of Sound

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A

Speed of sound related to how quickly energy can be transferred between particles in medium

  • Density (how close particles are to each other)
  • Elasticity (forces that exist between particles)

Speed increases…

  • With increase in temperature
  • Gas
20
Q

Periodic/Progressive Wave

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A

A wave which moves from one point to another point

21
Q

Wave Pulse

Study These Flashcards
A

A short wave form that transmits a burst of energy through a medium

22
Q

Wave Train

Study These Flashcards
A

A repeated wave form which transmits energy continuously through a medium

23
Q

Wave Classification

Study These Flashcards
A
  1. Medium or No Medium

2. Nature of Vibration in Medium

24
Q

Medium or No Medium

Study These Flashcards
A
  • Mechanical waves

- Electromagnetic waves

25
Nature of Vibration in Medium
- Transverse waves | - Longitudinal waves
26
Mechanical Waves
Waves that require a physical medium for their propagation | e.g. sound and water waves, waves in strings
27
Electromagnetic Waves
Waves that do not require a particle medium and may consist of oscillating transverse electric and magnetic fields which vibrate mutually at right angles to their direction of propagation (e.g. light waves)
28
Transverse Waves
Particles in the medium through which a transverse wave is passing oscillate at 90 to the direction of motion of the wave (e.g. water waves and all electromagnetic waves, light waves and waves in strings)
29
Longitudinal Waves
Particles in the medium through which a longitudinal wave is passing vibrate parallel to the direction of motion of the wave
30
Wavelength
The distance between two successive points in a phase | SI unit is metre (m)
31
Frequency
- The number of times per second that the particles of the medium make a complete oscillation - Frequency can also be thought of as the number of wave crests that pass a particular point in a second Unit is Hz
32
Amplitude
The maximum displacement of a particle from its mean position - Is an indication of the energy content of the wave
33
Phase
Particles in a medium are in phase if they are undergoing identical motion (have the same velocity and displacement)
34
Angular Phase Difference
Motion of particles in a medium may be described in terms of their angular displacement
35
Period
The time taken for a particles in the medium to complete one oscillation or vibration - Also the time taken for one wavelength pass a given point ``` T = 1/f f = 1/T ```
36
Speed of Sound
Speed of sound related to how quickly energy can be transferred between particles in medium - Density (how close particles are to each other) - Elasticity (forces that exist between particles) Speed increases... - With increase in temperature - Gas
37
Wave Equation
v = f 𝜆
38
Ultrasonic, Supersonic, Infrasonic
Ultrasonic - High frequency (i.e. f > 20 kHz) Supersonic - High speed (i.e. greater than the speed of sound approx. 340m/s) Infrasonic - Frequencies below the audible range (i.e. f
39
Wavefront
A line representing a crest of a transverse wave or a compression on a longitudinal wave
40
Ray
A line drawn at 90 to the wavefront and indicating its direction
41
Plane Waves
Consist of straight parallel wavefronts | - Originate from a point source a long distance away
42
Circular Waves
Consist of concentric circular wavefronts | - Originate a short distance away from a point source

PHYS1030 (9 decks)

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