Electromagnetic Waves

Question 1

Can electromagnetic waves travel through a vacuum?

Answer 1

YES

-this because they aren’t vibrations of particles but vibrations of electric and magnetic fields

Question 2

What type of waves are electromagnetic waves?

Answer 2

Transverse waves

Question 3

What is the order of the electromagnetic spectrum?

Answer 3

Radio
Micro
Infrared
Visible
UV
X-Rays
Gamma

Question 4

What are radio waves used for?

Answer 4

Bluetooth- e.g. wireless headsets

TV and FM radios

Question 5

What are microwaves used for?

Answer 5

Communication between satellites

Microwave ovens

Question 6

Why are microwaves used for communication between satellites?

Answer 6

Because they can pass easily through the Earth’s watery atmosphere

Question 7

What are infrared waves used for?

Answer 7

Infrared cameras
Thermal imaging
Security
Electric heaters
Transfer information
TV remotes and mobile phones

Question 8

What is visible light used for?

Answer 8

Photographic filming

Digital cameras

Question 9

What are ultraviolet rays used for?

Answer 9

Security pens
Bank notes and passports
Sterilise water

Question 10

What are x-rays used for?

Answer 10

Airport security scanners
Photographic filming
X-Rays

Question 11

What are gamma rays used for?

Answer 11

Sterilise medical instruments-kills microbes
Medical imaging
Kills cancer cells