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Physics P1 > P1.5 Waves > Flashcards

P1.5 Waves Flashcards

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1
Q

<p>What is wavelength?</p>

A

<p>The distance between two points on a wave (The same point)</p>

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2
Q

<p>what is frequency?</p>

A

<p>number of waves per second (Hz)</p>

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3
Q

<p>what are longitude waves?</p>

A

<p>Sound waves and waves in a stretched spring</p>

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4
Q

<p>what are transverse waves?</p>

A

<p>Light and other types of electromagnetic radiation </p>

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5
Q

what is the electromagnetic spectrum

A

The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation

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6
Q

<p>what is amplitude</p>

A

<p>the maximum height of a wave from the middle of the wave to its crest or through</p>

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7
Q

<p>what is pitch</p>

A

<p>the frequency of a sound. sounds with a high pitch have a high frequency.</p>

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8
Q

what is duration

A

the duration of the sound

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9
Q

what is loudness

A

whether its loud or quiet

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10
Q

what are light waves

A

the waves of light that travel to a certain place.

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11
Q

What is a transverse wave?

A

A wave which has vibrations perpendicular (90 degrees) to their direction of travel.

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12
Q

What is a longitudinal wave?

A

A wave which has vibrations that are parallel to their direction of travel.

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13
Q

what is the a example of a longitudinal wave?

A

sound wave

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14
Q

waves transfer…..?

A

Energy without transferring any matter.

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15
Q

what is wavelength measured in

A

metres

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16
Q

what does it mean that the frequency of a wave is 25 hertz

A

there are 25 waves per second

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17
Q

how do you calculate speed of a wave?

A

frequency X wavelength

18
Q

what is meant by diffraction?

A

The spreading out of waves when they pass through a gap or an obstacle

19
Q

what is refraction?

A

when a wave changes direction as it hits the boundary between two different media

20
Q

what is the name given to a reflected sound wave?

A

echo

21
Q

what similar properties do EM waves have?

A

can be reflected
can travel through a vacuum
can be refracted

22
Q

what is speed measured in?

A

m/s

23
Q

what is frequency measured in?

A

Hz

24
Q

what is wavelength measured in?

A

M

25
Q

the reflection of light allows us to?

A

see objects as light bounces off them into your eyes

26
Q

the angle of incidence ALWAYS EQUALS?

A

the angle of reflection

27
Q

what uses do infrared waves have?

A

remote controls

28
Q

what uses to microwaves have?

A

mobile phones

29
Q

what waves are in the electromagnetic spectrum?

A

Radio, microwave, infared, visible light, ultraviolet, x rays and gamma rays

30
Q

EM waves with higher frequencies have…?

A

shorter wavelengths

31
Q

does the wave length get bigger or smaller as you go down the spectrum?

A

smaller

32
Q

why are radio waves used for communication?

A

-long waves, can diffract around curves of the earth

33
Q

waves are only refracted when?

A

they meet a new medium at an angle

34
Q

why are microwaves used to satellite communication?

A
  • they can pass through the earths watery atmosphere - radio waves can’t
  • signal is transmitted to space and picked up by a satellite and transmitted back to a satellite dish on the earth
35
Q

what does sound travel as?

A

a wave

36
Q

why can’t sound travel in space?

A

because it’s a vacuum- got no particles to pass the vibration

37
Q

why do you hear a delay between the original sound and the echo?

A

because echoed sound waves have to travel further so it takes longer to reach your ears

38
Q

how may Hz in a kHz?

A

1000

39
Q

a high frequency or high pitch also means a?

A

shorter wavelength

40
Q

what is the doppler effect?

A

the frequency of a source moving towards you will seem higher and it’s wavelength will seem shorter.
the frequency of a source moving away will seem lower and it’s wavelength will seem longer.

Physics P1 (7 decks)

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