waves -unit 1 year 10 Flashcards

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1
Q

what are the 4 types of waves?

A

longitudinal, transverse, mechanical and electromagnetic

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2
Q

what is a longitudinal wave?

A

a longitudinal wave is a wave where the oscillations are parallel to the movement of energy transfer

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3
Q

example of a longitudinal wave:

A

sound waves

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4
Q

what is a transverse wave?

A

a transverse wave is where the oscillations are perpendicular to the direction of energy transfer.

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5
Q

example of a transverse wave:

A

light waves

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6
Q

specific example of a transverse wave:

A

ripples on a water surface

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7
Q

what is the amplitude of a wave?

A

the amplitude is the maximum point of displacement in a wave

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8
Q

what is the wavelength of a wave?

A

the wavelength is the distance between one point on a wave to the equivalent point on the next wave

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9
Q

what is the frequency of a wave?

A

frequency is the amount of oscillations per second

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10
Q

what is the period of a wave?

A

the period of a wave is the amount of time it takes for one wave to pass a point

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11
Q

what is the equation for finding the period of a wave?

A

T = 1/f

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12
Q

what is the equation for wave speed?

A

V = F x wavelength

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13
Q

how is the pitch of a sound determined?

A

the pitch is determined by the frequency of a sound wave

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14
Q

how is the loudness of a sound determined?

A

the loudness is determined by the amplitude of a sound wave

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15
Q

what is an echo?

A

a sound wave being reflected

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16
Q

sounds can travel through ___ which causes ______ in the ____

A

sounds can travel through SOLIDS which causes VIBRATIONS in the SOLIDS

17
Q

how do we hear (basic)

A

soundwaves cause the eardrum and other parts to vibrate which causes the sensation of sound

18
Q

what is the range of human hearing?

A

20Hz - 20,000Hz

19
Q

___ waves have a ____ _____ than the upper limit of hearing for humans

A

ULTRASOUND waves have a FREQUENCY HIGHER than the upper limit of hearing for humans

20
Q

in what way are ultrasound waves reflected?

A

ultrasound waves are partially reflected when they meet a boundary between two different media

21
Q

what are ultrasound waves used for?

A

medical and industrial imaging

22
Q

what method is used to detect objects in deep water and measure water depth?

A

echo sounding

23
Q

what is the echo sounding method

A

the way of using high frequency sound waves to detect objects and measure water depth

24
Q

what type of waves are produced by earthquakes?

A

seismic waves

25
Q

what are the types of seismic waves?

A

S- and P-

26
Q

what do seismic waves do?

A

provide evidence for the structure and size of the earths core

27
Q

what are P- seismic waves?

A

P- waves are longitudinal waves and travel at different speeds through solids and liquids

28
Q

what are S- seismic waves?

A

S- waves are transverse waves and cannot travel through liquids

29
Q

name three things that waves can be at the boundary between two different materials:

A

be reflected, be absorbed, be transmitted

30
Q

why does refraction happen?

A

refraction happens due to the difference in velocity of the waves in different substances

31
Q

what is wave speed (v) measured in?

A

metres per second (m/s)

32
Q

what is frequency (f) measured in?

A

hertz (Hz)

33
Q

what is wavelength (λ) measured in?

A

metres (m)

34
Q
A