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Physics - s3 Waves > 3b Properties of waves > Flashcards

3b Properties of waves Flashcards

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1
Q

What are waves?

A

Waves transfer energy without matter. A wave is a vibration (oscillation)

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2
Q

What are Transverse waves?

A

Transverse waves are waves where the direction of vibrations is at 90 degrees to the direction in which the wave travels

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3
Q

What are longitudinal waves?

A

Longitudinal waves are when the vibrations are parallel to the direction the wave travels

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4
Q

Examples of Transverse waves

A

Mexican wave
Light
Radio wave
UV
X-RAY
Water wave
Micro waves
Any electromagnetic wave

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5
Q

Examples of Longitudinal waves

A

Sound
Pressure waves

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6
Q

What is the amplitude?

A

The maximum distance of a vibration from the rest position measured in m - dynamics

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7
Q

What is the frequency?

A

The number of complete oscillations per second. Measured in Hertz (Hz) - pitch

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8
Q

What is the time period?

A

Time taken for one complete oscillation. measured in s

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9
Q

What is the equation for time period and frequency?

A

T = 1/f
f = 1/T

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10
Q

What is the wavelength?

A

The distance between the same point on the two successive waves (eg. the distance between two successive peaks) measured in m

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11
Q

What is the Wavelength?

A

Distance between 2 waves

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12
Q

What is the amplitude?

A

Height of a wave

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13
Q

What is the crest?

A

Top of a wave

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14
Q

What is the trough?

A

Bottom of a wave

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15
Q

What is compression?

A

Where particles are closest together

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16
Q

What is rarefaction?

A

Where particles are furthest apart

17
Q

What is the equation for wave speed?

A

Wave speed = Frequency x Wavelength
m/s = Hz x m

18
Q

What is the doppler affect?

A

The doppler effect is a change in observed frequency of a wave if the source of detector are moving towards/away from each other

The faster the motion, the greater the change in frequency

eg. car moving towards/ away from observer

19
Q

Moving towards observer (doppler effect)

A

If the source is moving towards the observer or the observer is moving towards the source, the observed frequency will be higher than the emitted frequency

20
Q

Moving away from each other (doppler effect)

A

If the source and observer are moving away from each other, the observed frequency is lower than the emitted frequency

Physics - s3 Waves (3 decks)

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