EM Waves and Their Uses Flashcards
1
Q
What are microwaves mainly used by in communication?
A
Satellites
2
Q
What objects give out infrared radiation?
A
All objects
3
Q
How do infrared cameras detect infrared radiation and monitor temperature?
A
It detects the IR radiation and turns it into an electrical signal, which is displayed on a screen as a picture
4
Q
How do Microwave ovens heat food with microwaves?
A
The microwave oven emits microwaves penetrating the food a few cms in which is absorbed and turned into water molecules
