Waves and Radiation

Question 1

What do all waves transfer

Answer 1

Energy

Question 2

What are the two types of waves

Answer 2

Transverse and Longitudinal

Question 3

What is the highest point of a wave called ?

Answer 3

Crest

Question 4

What is the lowest point of a wave called ?

Answer 4

Trough

Question 5

What is the definition of the amplitude of a wave ?

Answer 5

Size of maximum disturbance from the zero position

Question 6

What is the speed of sound in air ?

Answer 6

340 metres per second

Question 7

What is the scientific notation of ‘nano’ ?

Answer 7

x10-9

Question 8

What is the scientific notation of ‘micro’ ?

Answer 8

x10-6

Question 9

What is the scientific notation of ‘milli’ ?

Answer 9

x10-3

Question 10

What is the scientific notation of ‘kilo’ ?

Answer 10

x10*3

Question 11

What is the scientific notation of ‘mega’ ?

Answer 11

x10*6

Question 12

What is the scientific notation of ‘giga’

Answer 12

x10*9

Question 13

In sound waves, a high pitch would mean…

Answer 13

High frequency

Question 14

In sound waves, a low pitch would mean…

Answer 14

Low frequency

Question 15

In sound waves, the loudness of the sound affects…

Answer 15

The amplitude of the sound

Question 16

Sound level is measured in…

Answer 16

Decibells/dB

Question 17

In diffraction, the shorter the wavelength…

Answer 17

The less the wave will diffract

Question 18

In diffraction, the longer the wavelength…

Answer 18

The more the wave will diffract

Question 19

All electromagnetic waves…

Answer 19

Transfer energy
Are transverse waves
Travel at 300,000,000 metres per second
All diffract

Question 20

In the EM spectrum, the longer the wavelength…

Answer 20

The lower the frequency and energy

Question 21

In the EM spectrum, the shorter the wavelength…

Answer 21

The higher the frequency and energy

Question 22

Name a detector of Radio and TV waves

Answer 22

Aerial

Question 23

Name a detector of Microwaves

Answer 23

Aerial

Question 24

Microwaves are used to…

Answer 24

Carry signals to a satellite in space

Heat food

Question 25

Uses of Infrared Radiation

Answer 25

Heal damaged muscle tissue Dry paint Thermal imaging

Question 26

Detectors of Infrared Radiation

Answer 26

Photodiode | Thermometer

Question 27

Visible light is made up of…

Answer 27

Different colours/wavelengths

Question 28

Uses of visible light

Answer 28

Remove birth marks Remove tattoos Kill cancerous tumors

Question 29

Detectors of visible light

Answer 29

Photodiode Human eye Photographic film

Question 30

Most of our UltraViolet radiation comes from…

Answer 30

The sun

Question 31

How can too much ultraviolet radiation be harmful?

Answer 31

Damage skin or cause skin cancer

Question 32

Uses of UV radiation

Answer 32

Treat skin conditions like acne | Security markings

Question 33

Detectors of UV radiation

Answer 33

Photodiode | Photographic film

Question 34

Uses of X-rays

Answer 34

Detect broken bones

Question 35

Detector of X-rays

Answer 35

Photographic film

Question 36

Uses of Gamma rays

Answer 36

Tracer Gamma radiation injected into bloodstream with a gamma camera detecting the radiation emitted. This creates an image of blood flow through the body.

Question 37

Detectors of Gamma radiation

Answer 37

Photographic film | Geiger-Müller tube

Question 38

Refraction causes a change in…

Answer 38

Wave speed Wavelength Direction

Question 39

In refraction, towards the normal means

Answer 39

Wavelength decreases | Speed decreases

Question 40

In refraction, away from the normal means…

Answer 40

Wavelength increases | Speed increases

Question 41

In refraction, a convex lens shows the light…

Answer 41

Meets after the lens

Question 42

In refraction, a concave lens means the light…

Answer 42

Moves away from each other after lens

Question 43

A nucleus is made up of…

Answer 43

Protons and neutrons

Question 44

What is the charge of a proton?

Answer 44

Positive

Question 45

What is the charge of a neutron?

Answer 45

No charge

Question 46

What orbits the nucleus?

Answer 46

Electrons

Question 47

What is the charge of an electron?

Answer 47

Negative

Question 48

Alpha radiation is…

Answer 48

A helium nucleus

Question 49

Beta radiation is…

Answer 49

A fast moving electron

Question 50

Gamma radiation is…

Answer 50

An electromagnetic wave

Question 51

What is the definition of ionisation

Answer 51

Ionisation is when an atom loses or gains an electron

Question 52

How can you stop alpha particles?

Answer 52

2cm of air | Thin sheet of paper

Question 53

How can you stop beta particles?

Answer 53

2 metres of air | 2.3mm of Aluminium

Question 54

How can you stop gamma radiation?

Answer 54

Thick lead or thick concrete | Air does not stop this

Question 55

Activity is…

Answer 55

The number of nuclear disintegrations (decays) per second

Question 56

One becquerel is…

Answer 56

One decay per second

Question 57

Natural radiations…

Answer 57

Cosmic rays Rocks and soil Human body

Question 58

Artificial radiations…

Answer 58

Nuclear waste Fallout from weapons testing Nuclear accidents

Question 59

Half life is…

Answer 59

The time for the activity to half

Question 60

The activity of a source ________ with time

Answer 60

Decreases

Question 61

The biological effect of radiation depends on three factors:

Answer 61

Absorbed dose Type of radiation Type of tissue absorbing the radiation

Question 62

Absorbed dose is the energy absorbed by…

Answer 62

1kg of mass absorbing material

Question 63

The equivalent dose is a measure of…

Answer 63

The biological harm that the radiation has on a tissue

Question 64

Equivalent dose is measured in…

Answer 64

Sieverts or Sv

Question 65

What type of radiation are humans at a greater biological risk of?

Answer 65

Natural sources