Waves Flashcards

1
Q

Two types of waves

A

Transverse and longitudinal

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2
Q

What is an example of a transverse wave in an experiment

A

The ripples on a water surface

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3
Q

What do longitudinal waves show areas of

A

Compressions and rarefactions

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4
Q

What are sound waves which travel through air

A

Longitudinal

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5
Q

What is the amplitude of a wave

A

The maximum displacement of a point on a wave away form its undisturbed position

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6
Q

What is the wavelength of a wave

A

The distance from on one way to the equivalent point on the adjacent wave

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7
Q

What is the frequency of a wave?

A

The number of waves passing a point each second

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8
Q

What is period measured in

A

Second (s)

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9
Q

What is period written as

A

T

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10
Q

How is frequency written

A

f

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11
Q

What is frequency measured in

A

hertz (Hz)

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12
Q

What is the wave speed

A

Is the speed at which the energy is transferred or the wave moves through the medium

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13
Q

What is the wave speed equation

A

Wave speed = frequency x wavelength

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14
Q

What is the wave speed equation in letters

A

[v=f(upside down y)]

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15
Q

How is wave speed written as

A

v

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16
Q

What is wave speed measured in?

A

Metres per second (m/s)

17
Q

How is wave length written as

A

(Upside down y)

18
Q

What is waves speed measured in ?

A

Meters per sec (m/s)

19
Q

What are Electromagnetic waves

A

Transverse waves

20
Q

What do electro magnetic waves do

A

They transfer energy from the source of a wave to an absorber

21
Q

What do electromagnetic waves form?

A

A continuous spectrum and all types of electromagnetic waves travel at the same velocity through a vacuum (space)or air

22
Q

In the Electromagnetic spectrum, what is the start to the end? In wavelength

A

Long to short

23
Q

In the Electromagnetic spectrum, what is the start to the end? In frequency

A

Low to high

24
Q

Name the waves in the electromagnetic spectrum?

A

Radio waves, microwaves, infrared, visible light, ultraviolet, x-rays,gamma rays

25
What do eyes need detect?
Visible light and so detect a limited range of electromagnetic waves
26
What radio waves produce?
Oscillations in electrical circuits
27
What happens when a radio wave is absorbed
They my create alternating current with the same frequency as the radio wave itself so radio waves can themselves induce oscillations in electrical circuit
28
What can changes in atoms and the nuclei of atoms result in electromagnetic waves
Electromagnetic waves from being generated or absorbed over a wide frequency range
29
What waves have hazardous effects on humans
Ultraviolet waves, x-rays, and gamma waves have effects on human body tissue
30
Whats hazardous form the wave
Type of radiation ☢️ and the size of the dose
31
What is radiation dose
A measure of the sick of harm resulting on exposure of the body to the radiation
32
What can ultraviolet waves cause
It can cause teh skin to age prematurely and increase the risk of skin cancer
33
What does x rays and gamma rays do to the body
They are ionising radiation and can cause mutations of genes, and therefore result to cancer
34
What is a use of radio waves
Television and radio
35
What is a use of microwaves
Satellite communication and cooking food
36
What is a use of infrared
Electrical heaters, cooking food, infrared cameras
37
What is a use of visible light
Fibre optic communications
38
What is a use of ultraviolet
Energy efficient lamps, sun tanning
39
What is a use of x rays and gamma rays
Medical imaging and treatments