EM Waves and Their Uses Flashcards

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1
Q

What are microwaves mainly used by in communication?

A

Satellites

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2
Q

What objects give out infrared radiation?

A

All objects

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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

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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

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