EM Waves

Question 1

What are the seven types of electromagnetic waves?

Answer 1

Radio waves, Microwaves, Infra red, Visible light, Ultra violet, X-Rays and Gamma rays.

Question 2

What EM wave has the highest frequency and smallest wavelength?

Answer 2

Gamma rays.

Question 3

How are radio waves used for communication?

Answer 3

Short-wave signals reflect off the ionosphere and transmit there signals to satellites (radio and tv) and long-wave signals diffract around the earth.

Question 4

What are microwaves used for?

Answer 4

Satellite communication and mobile phones

Question 5

How do optical fibres work?

Answer 5

They carry data over long distances very quickly. The signal is carried as pulses of light or infra red radiation and is reflected off the sides of a very narrow core from one end of the fibre to the other.

Question 6

The higher the frequency, the higher the _____.

Answer 6

Pitch