Microwaves

300 MHz to 300 GHz

Frequency of microwaves

1 mm to 30 cm

Wavelength of microwaves

Microwaves

This type of EM wave can penetrate the atmosphere of the Earth (used in communication satellites)

35,000 km

Altitude of these communication satellites around the Earth above the equator

11,300 km per hour

Speed of microwaves

Radar, terrestrial communication, phone, microwave oven

Some applications of microwaves satellite communications

Percy Spencer

A self-taught engineer that accidentally invented the microwaves

1945

The year microwaves were invented

Raytheon

A radar project that Percy Spencer was leading for the defense giant

Magnetron

A vacuum tube that Percy Spencer was testing when he discovered that a chocolate bar in his pocket had melted from heat