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CC-2224 Physics Paper 2 Topics > P12(Wave Properties) > Flashcards

P12(Wave Properties) Flashcards

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1
Q

What is a wave

A

-waves transfer energy/information without transferring matter

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2
Q

What are mechanical waves

A

-vibrations that travel through a medium

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3
Q

What are examples of mechanical waves

A

-sound waves
-water waves
-waves on springs and ropes
-seismic waves

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4
Q

What are electromagnetic waves

A

-Waves which can travel through a vacuum at the speed of light
-no medium is needed
-EM waves slow down in a medium

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5
Q

What are examples of electromagnetic waves

A

-light waves
-radio waves
-microwaves

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6
Q

What are transverse waves

A

Waves oscillate perpendicular to the direction of energy transfer of the waves

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7
Q

What waves are transverse

A

-electromagnetic waves
-mechanical waves

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8
Q

What are longitudinal waves

A

Waves oscillate parallel to the direction of energy transfer of the waves

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9
Q

What waves are longitudinal

A

-Sound waves
-mechanical waves

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10
Q

What is amplitude

A

Maximum displacement from rest position

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11
Q

What is wavelength

A

The distance from a point on the wave to the equivalent point on the adjacent wave

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12
Q

What is frequency

A

The number of waves passing a fixed point every second

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13
Q

What are units of amplitude, wavelength and frequency

A

-amplitude and wavelength measured in metres
-frequency measured in hertz

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14
Q

What is the formula for time period

A
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15
Q

What’s the formula for wave speed

A
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16
Q

What is reflection

A

Bending of light without changing a medium

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17
Q

What is refraction

A

Bending of light with change of medium

18
Q

When does refraction occur

A

At a boundary between two different materials because the speed and wavelength of the waves change at the boundary

19
Q

At a boundary between two different materials waves can be ….

A

Transmitted or absorbed

20
Q

What are sound waves

A

Vibrations that travel through a medium

21
Q

Sound waves cannot travel …

A

Through a vacuum(space)

22
Q

To investigate waves you use a …

A

-a ripple tank for water waves
-a stretched string for waves in a solid
-a signal generator and a loudspeaker for sound waves

23
Q

The pitch of a note increases if the ….

A

frequency of the sound waves increases

24
Q

The loudness of a note increases if the …

A

Amplitude of the sound wave increases

25
Q

Sound waves cause the …

A

Ear drum to vibrate and the vibrations send signals to the brain

26
Q

What are ultrasound waves

A

Ultrasound waves are sound waves of frequency above 20KHz

27
Q

Ultrasound waves are …

A

Partly reflected at a boundary between two different types of body tissue

28
Q

Ultrasound waves reflected at boundaries are …

A

Timed and the timings are used to calculate distances

29
Q

An ultrasound scan is …

A

-Non Ionising
-so it is safer than an x-ray

30
Q

What’s the formula to calculate the distance travelled by the ultrasound wave

A
31
Q

What’s the formula for the depth of the boundary below the surface

A
32
Q

What are seismic waves

A

Waves that travel through the earth

33
Q

How are seismic waves produced

A

In earthquakes

34
Q

What are primary seismic waves(P waves)

A

-Cause the initial tremors lasting about one minute
-they are longitudinal waves
-they push or pull on material as they move through the earth

35
Q

What are secondary seismic waves(S waves)

A

-cause more tremors a few minutes later
-they are transverse waves that travel more slowly than P waves
-they shake the material that they pass through inside the earth from side to side

36
Q

What are L waves

A

-cause violent movements on the surface up and down and backwards and forwards
-they travel more slowly than P waves and S waves
-they only happen in the earths crust

37
Q

What is blackbody radiation

A

An object that absorbs all of the radiation incident on it and does not reflect or transmit any radiation

38
Q
A
39
Q
A
40
Q
A
41
Q
A

CC-2224 Physics Paper 2 Topics (10 decks)

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