Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics Paper 2 > Tranverse And Longitudinal Waves > Flashcards

Tranverse And Longitudinal Waves Flashcards

1
Q

What are 3 examples of longitudinal waves?

A

Sound waves
Ultrasound waves
Seismic P-Waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How are longitudinal waves demonstrated

A

With areas of compression and refraction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Why do compressions have high pressure?

A

Because particles are close together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

With what object are longitudinal waved demonstrated with?

A

A slinky

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

How do particles move through longitudinal waves?

A

Particles, they move backwards and forwards between compressions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are five examples of transverse waves?

A

Ripples on water
Vibrations of guitar strings
Mexican waves
Electromagnetic waves
Seismic S-Waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How are transverse waves demonstrated?

A

Moving a rope up and down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How is energy transferred in a transverse wave

A

Up and down from left to right

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How do particles move in transverse waves?

A

Up and down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How do electromagnetic waves vibrate ?

A

At a right angle to direction of wave travel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

How do electromagnetic waves transfer energy?

A

As radiation from source of waves to an absorber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What can electromagnetic waves travel through?

A

A vacuum e.g space at speeds of 300 million meters per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is formed by the electromagnetism spectrum?

A

Waves with a continuous spectrum of waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the order of waves from longest to shortest?

A

Radio waves
Microwaves
Infrared
Visible light
Ultraviolet
X-Rays
Gamma Rays

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the properties for radio waves, microwaves and infrared light?

A

Long wavelength
Low frequency
Low energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the properties of Ultravoilet, X-Rays and Gamma rays?

A

Short wavelength
High frequency
High energy

17
Q

What are the properties red and purple light of visable light colours?

A

Red light has the lowest frequency’s of visible light
Purple light has the highest frequency of visible light

18
Q

What are features of radio waves?

A

Transmitted easily through air
Doesn’t cause damage

19
Q

What produces radio waves?

A

Oscillations in electrical circuits

20
Q

How do radio waves work?

A

Produces by oscillations in electric circuits
When absorbed by a conductor they create an alternating current
Electric current has same frequency as radio wave
Information is coded into the wave before transmission, which can then be decoded when the wave is received

21
Q

What are microwaves used for?

A

Cooking food and satellite communications

22
Q

How do microwaves heat food?

A

High frequency microwaves have frequencies which are easily absorbed by molecules in food
The internal energy of molecules increases when they absorb microwaves so they heat up

23
Q

Why are microwaves used in satellites?

A

They pass easily through the atmosphere so they can pass between stations on Earth and satellites in orbit

24
Q

What are infrared used for?

A

Electrical heaters, cookers and infrared cameras to see people in the dark

25
Q

How are infrared used in cooking food

A

Has frequencies which are easily absorbed by some chemical bonds
The internal energy of the bonds increases when they absorb infrared light which causes heating

26
Q

How is infrared used in cameras?

A

All objects emit infrared light, the human eye can’t detect it but infrared cameras can to see people in the dark with thermal imaging

27
Q

How is visible light used

A

Fibre optic communication where coded pulses of light travel through glass fibres from a source to a receiver

28
Q

What are the dangerous of ultraviolet

A

Hazardous effects on the body
Cause body to tan or burn in sunlight

29
Q

How is ultraviolet used in energy efficient lamps?

A

Fluorescent substances used to absorb ultraviolet light and re emit it as visable light

30
Q

How is electromagnetic waves generated and absorbed?

A

Changes happen in atoms and their nuclei

31
Q

Why are X-Rays and gamma rays useful for internal imaging?

A

High energy waves are transferred through the body tissue with very little absorption making them useful

32
Q

Why are X-Rays good for identifying broken bones

A

Because they are absorbed by high density structure like bones

33
Q

What is are examples of ionising radiation and what do they do?

A

X-rays and Ultraviolet
Add or remove electrons from molecules producing electrically charged ions

34
Q

What hazardous effects can ionising radiation have on the body?

A

Ultraviolet can cause skin to age prematurely and cause skin cancer
X-rays can cause mutation of genes which can lead to cancer

35
Q

What is radiation dose?

A

Measure of the risk of harm caused by exposing the body to ionising radiation

36
Q

What are doses is ionising radiation measured and given in?

A

Given in mSv
Measured in Sv

37
Q

Where is background radiation?

A

Radioactive rock in Earths crust
Cosmic rays in space
Nuclear weapons

Physics Paper 2 (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions