P13 The EM Spectrum

Question 1

Name the EM spectrum in order from highest wavelength to lowest wavelength

Answer 1

Radio waves, microwaves, infrared waves, visible light, ultra violet, x - rays, gamma rays

Question 2

What happens to the wavelength as you go from radiowaves to gamma rays

Answer 2

The wavelength decreases

Question 3

What happens to the frequency as you go from radio to gamma waves

Answer 3

The frequency increases

Question 4

What wavelengths and frequency do radio waves range from

Answer 4

Wavelength: 10^4 - 10^-1
Freq: 10^4 - 10^9

Question 5

What frequency and wavelength do microwaves range from

Answer 5

Wavelength: 10^-1 - 10^-3
Freq: 10^10 - 10^11

Question 6

What frequency and wavelength do infrared waves range from

Answer 6

Wavelength: 10^-3 - 10^-6
Freq: 10^12 - 10^14

Question 7

What freq and wavelength does visible light range from

Answer 7

Wavelength: 10^-6 - 10^-7
Freq: 10^14 - 10^15

Question 8

What freq and wavelngth does ultraviolet range from

Answer 8

Wavelength: 10^-7 - 10^-8
Freq: 10^15 - 10^16

Question 9

What freq and wavelength do x - rays range from

Answer 9

Wavelength: 10^-8 - 10^-10
Freq: 10^17 - 10^19

Question 10

What freq and wavelength do gamma rays range from

Answer 10

Wavelength: 10^-11 - 10^-12
Freq: 10^19 - 10^20

Question 11

What order do the colours come in

Answer 11

Red
Orange
Yellow
Green
Blue
Indigo
Violet

Question 12

Use of radiowaves

Answer 12

TV, radio, mobile phone

Question 13

Dangers of radio waves

Answer 13

None

Question 14

Uses of microwaves

Answer 14

Monile phones, cooking, satellite comms

Question 15

Dabgers of microwaves

Answer 15

Can cause cancer

Question 16

Use of infrared waves

Answer 16

Remote controls, thermal cameras, heating

Question 17

Dangers of infrared waves

Answer 17

Eye damage

Question 18

Uses of visible light

Answer 18

Illumination, fibre optic, comms

Question 19

Dangers of visible light

Answer 19

Eye damage

Question 20

Uses of ultraviolet

Answer 20

Killing bacteria, curing inks and resins, sun tanning, detecting forgeries

Question 21

Danger of UV light

Answer 21

Skin cancer, premature aging, cataracts

Question 22

Uses of x - rays

Answer 22

Examining inside of the body

Question 23

Dangers of x -rays

Answer 23

Cancer, mutates DNA, kills cells

Question 24

Uses of gamma rays

Answer 24

Radio therapy, sterylisation, nuclear industry

Question 25

Dangers of gamma rays

Answer 25

Cancer, mutates DNA, kills cells

Question 26

What can all EM waves do

Answer 26

Travel through a vacuum
Travel at the speed of light in a vacuum
All transverse waves

Question 27

What is ionising radiation

Answer 27

Radiation that has enough energy to displace an electron from an atom ( turns it into an ion ) e.g x -rays and gamma rays

Question 28

What is the speed of light

Answer 28

3 x 10^8 m/s

Question 29

What is the wave speed equation

Answer 29

Wavespeed (m/s)= frequency (Hz)x wavelength (m)

V = f x λ

Question 30

What makes waves travel further distances

Answer 30

A longer wavelength ( λ )

Question 31

What makes waves travel shorter distances but carry more information

Answer 31

A shorter wavelength (λ)