Waves

Question 1

What is wavelength

Answer 1

The distance between the same point in two adjacent waves

Question 2

What is frequency

Answer 2

The number of waves passing a certain point per second

Question 3

What is amplitude

Answer 3

The maximum displacement of a point on the wave from its rest position

Question 4

What is period

Answer 4

The time taken for one complete cycle of a wave to be completed

Question 5

What are mechanical waves

Answer 5

Waves that travel through a medium by vibrating particles

Question 6

Types of mechanical waves

Answer 6

Sound waves (through air)
Water waves (through water surface)
Seismic waves (through earth)

Question 7

What are electromagnetic waves

Answer 7

Oscillating electric and magnetic fields that do not need a medium to travel through

Question 8

Types of electromagnetic waves

Answer 8

Radio waves
Microwaves
Infra-red
Light
Ultra-violet
X-ray
Gamma

Question 9

What is a wave

Answer 9

An oscillation (vibration) that transfers energy without transferring any matter

Question 10

Transverse waves

Answer 10

When the oscillations are at a right angle to the direction the wave is travelling

Question 11

Types of transverse wave

Answer 11

Waves on a string/rope
Water waves
S-wave seismic waves
Electromagnetic waves

Question 12

What are longitudinal waves

Answer 12

When the oscillations are parallel to the direction the wave is travelling, compression waves

Question 13

Types of longitudinal waves

Answer 13

Sound waves
P-wave seismic waves

Question 14

Formula for wavelength

Answer 14

V = f x (lamda)
V- speed (m/s)
F- frequency (Hz)
(Lamda)- wavelength (m)

Question 15

Formula for frequency

Answer 15

T = 1/f
T - time period (s)
F - frequency (Hz)

Question 16

What is the speed of sound through air

Answer 16

330 m/s

Question 17

Why can’t sound travel through vacuums

Answer 17

There are no particles to carry the vibrations

Question 18

What state does sound travel fastest through

Answer 18

Solid

Question 19

What frequency’s can human ears detect

Answer 19

20Hz to 20,000Hz

Question 20

Sound waves are collected by the…in the ear

Answer 20

…Ear lobe (pinna)…

Question 21

Waves travel along the…in te ear

Answer 21

…ear canal…

Question 22

Waves make the…vibrate in the ear

Answer 22

…ear drum…

Question 23

The…amplify the sound wave vibrations in the ear

Answer 23

…small bones (ossicles)…

Question 24

The…turns the sound wave vibrations into electrical signals

Answer 24

…cochlea…

Question 25

The…takes sound signals to the brain

Answer 25

…auditory nerve…

Question 26

What are gamma rays used for

Answer 26

Cancer treatment

Question 27

Where are gamma rays sourced

Answer 27

Radioactive ☢️ decay

Question 28

What are risks of gamma radiation

Answer 28

Ionisation Damages tissues and DNA

Question 29

What are X-rays used for

Answer 29

Medical scans

Question 30

Where are X-rays sourced

Answer 30

Radon gas

Question 31

What are the risks of X-rays

Answer 31

Cancer

Question 32

What are ultraviolet rays used for

Answer 32

Forensics Sterilisation

Question 33

Where are ultraviolet rays sourced

Answer 33

The sun ☀️

Question 34

What are the risks of ultraviolet rays

Answer 34

Cancer

Question 35

What are light rays used for

Answer 35

Seeing/vision

Question 36

Where are light rays sourced from

Answer 36

The sun ☀️

Question 37

What are the risks of light rays

Answer 37

Worsened sleep habits

Question 38

What are the uses of infrared rays

Answer 38

Metal working Remote controls

Question 39

Where are infrared rays sourced

Answer 39

Solar radiation

Question 40

What are the risks of infrared rays

Answer 40

Burns 🥵

Question 41

What are microwave rays used for

Answer 41

Heating food

Question 42

Where are microwave rays sourced

Answer 42

Cosmic background radiation ☢️

Question 43

What are the risks of microwave rays

Answer 43

Exploding metal Burns 🥵

Question 44

What are radio waves used for

Answer 44

Sound transmission

Question 45

Where are radio waves sourced from

Answer 45

Lightning ⚡️

Question 46

What are the risks of radio waves

Answer 46

Burns 🥵

Question 47

What types of radiation are ionising

Answer 47

Gamma X-rays

Question 48

What radiation has the highest frequency and shortest wavelength

Answer 48

Gamma 💚

Question 49

What radiation has the lowest frequency and longest wavelength

Answer 49

Radio waves

Question 50

… increases as the wavelength shortens

Answer 50

Energy

Question 51

Order of radiation from low to high frequency

Answer 51

Radio waves Microwaves Infrared radiation Visible light Ultraviolet X-rays Gamma rays

Question 52

What can X-rays transmit through

Answer 52

Soft tissue

Question 53

What reflects X-rays

Answer 53

Bones 🦴 (Denser than soft tissue)

Question 54

What does CT scan stand for

Answer 54

Computerised Tomography scan

Question 55

How do X-rays lead to cancer

Answer 55

They are ionising so mutate cells

Question 56

What precautions are used in X-rays

Answer 56

Lead protectors are under to protect vital organs

Question 57

What is gamma knife surgery

Answer 57

Focuses gamma rays in many different directions and angles concentrated over the brain tumour

Question 58

Matte black surfaces absorb and emit the most …

Answer 58

Infrared radiation ☢️

Question 59

Shiny silver surfaces reflect…

Answer 59

Infrared radiation ☢️

Question 60

…cube showing infrared radiation

Answer 60

Leslie