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Physics > Topic 6 Core questions - Waves > Flashcards

Topic 6 Core questions - Waves Flashcards

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1
Q

The maximum displacement of a point on a wave away from its undisturbed position is the…

A

Amplitude

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2
Q

The distance from a point on one wave to the equivalent point on the next wave is the …

A

wavelength

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3
Q

The number of waves passing a point each second is the…

A

Frequency

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4
Q

Name an example of a longitudinal wave

A

Sound

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5
Q

Name an example of a transverse wave

A

light, water, any electromagnetic

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6
Q

Oscillations are along the same direction as the direction of travel is a _________ wave

A

longitudinal

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7
Q

Oscillations are at right angles to the direction of travel in a ____________ wave

A

transverse

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8
Q

The time needed for one wave to pass a given point is the…

A

period

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9
Q

The region in a longitudinal wave where particles are closest together is a …

A

compression

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10
Q

The region in a longitudinal wave where particles are furthest apart is a…

A

rarefaction

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11
Q

An object is said to _________ radiation when energy from an EM wave is taken up by the object

A

absorb

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12
Q

An object is said to _________ radiation when a wave can pass through the object

A

transmit

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13
Q

The process taking place when a wave bounces off of a surface

A

reflection

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14
Q

The process taking place when a wave enters a different density medium and changes direction

A

refraction

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15
Q

Refraction changes both the _________ and ___________ of a wave

A

direction and speed

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16
Q

Which two angles are equal in reflection

A

angle of incidence and angle of reflection

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17
Q

Write the equation for wave speed

A 
wave speed(m/s) = frequency(Hz) x wavelength(m)
v = fλ
18
Q

What is the unit of frequency?

A

Hertz (Hz)

19
Q

What is the unit of wavelength?

A

metres (m)

20
Q

What is the unit of wave speed?

A

metres per second (m/s)

21
Q

What is the speed of electromagnetic radiation?

A

300 000 000 m/s

3x10⁸

22
Q

What is the EM radiation with the shortest wavelength?

A

gamma

23
Q

What is the EM radiation with the longest wavelength?

A

radio

24
Q

What is the EM radiation with the highest frequency?

A

gamma

25
Q

What is the EM radiation with the lowest frequency?

A

Radio

26
Q

List the EM spectrum from long to short wavelength.

A

Radio, microwave, infrared, visible, UV, X-rays, gamma

27
Q

Can EM waves travel through space?

A

yes

28
Q

Can sound waves travel through space?

A

no

29
Q

Does a sound wave travel faster in water or air?

A

water

30
Q

Name a use of radio waves

A

TV and radio transmission

31
Q

What EM wave is used for satellite communication?

A

microwave

32
Q

Give one use of microwaves

A

cooking food

33
Q

Give two uses of IR radiation

A

electrical heaters, infrared cameras

34
Q

Give a use of visible radiation

A

Fibre optic communications

35
Q

Which radiation is used in sun tanning?

A

UV

36
Q

Give one use of X-rays.

A

Medical imaging

37
Q

Give one use of gamma rays

A

Medical treatments

38
Q

Why are X-rays good for taking images of bone?

A

absorbed by bone but transmitted through soft tissue

39
Q

Why are gamma rays used in medical treatment?

A

Can kill cancer cells

40
Q

What are the risks of exposure to UV radiation?

A

Premature skin ageing, increased risk of skin cancer

41
Q

What are the risks of exposure of X-rays?

A

X-rays are ionising so can cause mutations that may result in cancer

42
Q

What are the risks of exposure to gamma rays?

A

Gamma rays are ionising so can cause mutations that may result in cancer

Physics (8 decks)

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