EM Waves Flashcards
1
Q
What are two features of all EM waves?
A
All transverse and all travel the same speed in a vacuum.
2
Q
What are radio waves used for?
A
TV and FM radio.
3
Q
What are microwaves used for?
A
Satellite communication, cooking.
4
Q
How do microwaves cook?
A
They penetrate a few centimeters into the food before being absorbed.
5
Q
What is infrared used for?
A
Used in night vision equipment and electrical heaters.
6
Q
What is visible light used for?
A
Optical fibres, photography.
7
Q
What is ultraviolet used in?
A
Fluorescent lights, tanning beds.
8
Q
What are X-rays used in?
A
X-ray machines and to take X-ray photographs.
9
Q
What is gamma radiation used for?
A
Sterilise medical equipment and to sterilise food.
