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Physics > Waves > Flashcards

Waves Flashcards

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1
Q

What is Wave length

A

Distance from one point on a wave to same point on the next wave

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2
Q

What is amplitude

A

The maximum disturbance from its rest position

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3
Q

What is frequency

A

Number of waves per second

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4
Q

What is period

A

Time taken to produce one complete wave

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5
Q

How do you measure speed in water

A

Ripple tank

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6
Q

How do you measure speed in air

A

We Use echoes

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7
Q

What does the vibration do in transverse waves

A

Vibration causing the wave is at right angles to the direction of energy transfer

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8
Q

Where is energy carried on a transverse wave

A

Outwards by the wave

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9
Q

What does the vibration do in longitudinal waves

A

Vibration causing the wave is parallel to the direction of energy transfer

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10
Q

Where is energy carried on a longitudinal wave

A

Along the wave

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11
Q

Example of a transverse wave

A

Water and light waves

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12
Q

Example of a longitudinal wave

A

Sound waves

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13
Q

What letter is a transverse wave

A

S

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14
Q

What letter is a longitudinal wave

A

P

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15
Q

What is an electromagnetic wave

A

Short wavelengths have high-frequency and high-energy

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16
Q

Black surfaces

A

Good emitters

good absorbers

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17
Q

White sufaces

A

Poor emitters

Poor absorbers

18
Q

shiny surfaces

A

Good reflectors

19
Q

Danger of radio waves

A

none

20
Q

Danger of microwaves

A

Burning if concentrated

21
Q

Danger of infrared waves

A

Burning if concentrated

22
Q

Danger of visible

A

Damaged eyes

23
Q

Danger of ultraviolet waves

A

Sunburn

cancer

24
Q

Danger of x-rays

A

Cell destruction cancer mutation

25
Q

Danger of gamma waves

A

Cell destruction cancer mutation

26
Q

Example of radio waves

A

Communications TV radio

27
Q

Example of microwaves

A

Mobile phones cooking satellites

28
Q

Example infrared waves

A

Heating
remote controls
cooking

29
Q

Example of visible

A

Photography
Fibre optics
Illumination

30
Q

Example of ultraviolet waves

A

Security marking

Disinfecting water

31
Q

Example x-ray

A

Broken bones

airport security

32
Q

Example of gamma

A

Sterilising detecting and killing cancer

33
Q

Do EM waves refract

A

Yes

34
Q

Partially reflected off boundry

A

Ultrasound

35
Q

Reflected off objects

A

Sonar

36
Q

Why are sonars used

A

To determine depth of object under the sea

37
Q

Why are ultrasounds USED

A

Medical foetal scans

38
Q

What is wave speed measured in

A

m/s

39
Q

What is wavelength measured in

A

m

40
Q

What is frequency measured in in

A

Hz

41
Q

What is period Measured in

A

seconds

Physics (7 decks)

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