ANSWER IT:
What is radio?
a way of sending sounds or other information through the air.
Radio waves are sent out by a device called a ____________.
transmitter
TRUE OR FALSE: Radio waves is energy that moves.
FALSE: Radio waves are a type of radiation (energy that moves).
What happens after radio waves are picked up by an antenna?
Separates the electric signals turns them into the original sounds.
Demonstrated the theory that someone could produce and detect electromagnetic radiation in 1888.
Heinrich Hertz
What uses radio waves?
Radar, cell phones, cordless telephones, wireless computer networks, and other forms of communication
The transmitter turns talking, music, pictures, or other information into ____________
electric signals
TRUE OR FALSE: Radiation and radio waves have a property called frequency.
A receiver that picks up waves that carry sound is called:
Radio
Built first wireless transmitter in 1896
Guglielmo Marconi
What is the purpose of Frequency?
describes the number of waves that pass a given point each second.
A transmitter combines electric signals with ___________ of a certain frequency.
Radio waves
TRUE OR FALSE: waves spread out in all directions from an antenna connected to the frequency.
FALSE: the antenna is connected to the transmitter
What does it mean a person changes a radio from one frequency to another?
to hear different stations.
TESLA - ARMSTRONG - MAXWELL
Invented FM radio in 1933
Edwin H. Armstrong