COMMUNICATION WITH WAVES (Physics)

Question 1

COMMUNICATION WITH WAVES

Answer 1

• receives signals from ground stations
• transmits over wide areas
• uses frequencies 1-40GHz

Question 2

MOBILE PHONES

Answer 2

• every cell covers a few square km
• uses frequencies from 800MHz - 2.6GHZ
• has own transciever that recieves and sends signals

Question 3

NETWORK

Answer 3

• this is a group of devices together
• can be wired or wireless e.g bluetooth and WiFi
• use frequencies around 2.4 GHz

Question 4

INFARED DEVICES

Answer 4

• have very high frequencies but info is sent as pulses like turning remote on and off
• frequency of pulses around 40kHz

Question 5

HANDSHAKING

Answer 5

• before connection of devices they need to send most into which allows communication