Waves Flashcards

1
Q

Amplitude (A)

A

The length from the middle of the wave, to the crest. It is measured in meters (m). Also know as the maximum displacement of a wave, away form the equilibrium.

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2
Q

Displacement (s)

A

The distance from the equilibrium position until the next wave is transmitted. It is measured in meters (m).

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3
Q

Wavelength (λ)

A

The distance between identical points in a wave (e.g. between two crests or two troughs). It is measured in meters (m).

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4
Q

Frequency (f)

A

The number of waves passing through a certain point in one second. It is measured in hertz (Hz) or - the number of vibrations a wave makes each second

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5
Q

Wave speed (v)

A

How far the wave travels in a certain time. It is measured in meters per second (m/s).

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6
Q

Crest

A

The highest point of a wave.

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7
Q

Waves

A

Vibrations/oscillations moving from one place to another, that carry energy.

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8
Q

Transverse wave

A

A wave motion where the particles in the medium oscillate about their equilibrium perpendicular to the direction of energy. Eg, energy > particles ^. Examples of transverse waves are water waves, light waves and other electromagnetic waves.

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9
Q

Longitudinal waves

A

The particles move in the same direction as the energy. Eg, energy> particles>. This creates rarefactions and compressions. Examples of longitudinal waves are sound waves.

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10
Q

Trough

A

The lowest point of a wave

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11
Q

Period (T)

A

The time taken for a particle in the wave to make one complete vibration cycle. It is measured in seconds

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12
Q

Velocity

A

It is the distance the wavefront moves per second (ms^-1)

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13
Q

Wave equation

A

v = fλ.

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14
Q

Ultrasound

A

Sound wave frequencies above the human hearing range

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15
Q

Infrasound

A

Sound wave frequencies below the human hearing range

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16
Q

Rarefaction

A

A region in a longitudinal wave where the particles are furthest apart.

17
Q

Compression

A

A region in a longitudinal wave where the particles are closest together.