Uses of EM waves

FIBER OPTICS are important in telecommunication.

• True

• False

The system from the satellite to the earth station through the channel is called the downlink.

• True

• False

Long wavelength radio waves are used for television and FM radio.

• True

• False

_______________ was discovered by Sir Frederick William Herschel in 1800.

• Radio waves

• Microwaves

• Infrared

• LASER

Some _______________ pass easily through the Earth’s atmosphere, particularly in ionosphere and so are used in satellite communication systems, for example in making international phone calls.

• Radio waves

• Microwaves

• Infrared

• LASER