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physics 2 > mechanical waves > Flashcards

mechanical waves Flashcards

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1
Q

what does wavelength mean

A

the distance from one point on a wave to the equivalent point on the next wave

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2
Q

what is frequency

A

the number of waves passing a fixed point per second

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3
Q

what is a waves amplitude

A

the distance between a waves resting point to its peak or trough

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4
Q

what is rarefaction

A

the point on a longitudinal wave where the particles are furthest apart

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5
Q

what is a compression

A

the point on a longitudinal wave where the particles are closest together

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6
Q

what is a peak

A

the highest point on a transverse wave

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7
Q

what is the trough

A

the lowest point on a transverse wave

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8
Q

what is a transverse wave

A

where the oscillations are perpendicular to the direction of energy transfer

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9
Q

what is a longitudinal wave

A

where the oscillations are parallel to the direction of energy transfer

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10
Q

what is an example of a transverse wave

A

water wave

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11
Q

what is an example of a. longitudinal wave

A

sound wave

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12
Q

what is the symbol and unit for wave length

A

upside down y and metres

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13
Q

what is the symbol and unit for amplitude

A

A and metres (m)

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14
Q

what is the symbol and unit for frequency

A

f and hertz (Hz)

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15
Q

what is the period of a wave

A

the time taken for one complete wave to pass a fixed point

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16
Q

what is the symbol and unit for period

A

T and seconds

17
Q

what is wave speed

A

the distance travelled by each wave per second and the speed at which energy is transferred by the wave

18
Q

what is the symbol and unit for wave speed

A

v and metres per second

19
Q

what can happen when a wave meets the boundary between two substances

A

absorption
reflection
refraction
transmission

20
Q

what is absorption

A

the energy of the wave is transferred to the energy stores of the substance it travels through eg food being heated in a microwave

21
Q

what is refraction

A

the waves change speed and direction as they cross the boundary

22
Q

what is reflection

A

the wave bounces back

23
Q

what is transmission

A

the waves carry on moving once they’ve crossed the boundary but may be refracted

physics 2 (8 decks)

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