Radio Waves

Question 1

Has the longest wavelength and the lowest frequency

Answer 1

Radio Waves

Question 2

Radio wave’s range of frequency

Answer 2

30 kHz - 300 gHz

Question 3

This determines the Radio Waves’ field strength and intensity

Answer 3

Amplitude

Question 4

Number of curves that pass through a given point per second

Answer 4

Frequency

Question 5

The distance between curves in waves

Answer 5

Wavelength

Question 6

How are radio waves produced? (basic explanation)

Answer 6

When negatively charged electrons move back and forth at a rapid pace

Question 7

These are pure Radio Waves that are constant in both frequency and amplitude

Answer 7

Carrier wave

Question 8

The stage of production where the carrier wave is mixed with information

Answer 8

Modulation Stage

Question 9

Process of the production in Radio Waves

Answer 9

1. Record the “information” (Music, speech, any form of media, etc.)
2. Modulation Stage
3. Transmission stage (Radio Waves are emitted in the antenna)
4. Radio waves get absorbed by the Receiver and processed

Question 10

A power amplifier that produces electric currents through the antenna

Answer 10

Transmitter

Question 11

This detects/absorbs radio waves which it then processes and demodulate

Answer 11

Radio Receiver

Question 12

An ionized part of the atmosphere where free electrons roam, as well as prone in reflecting radio waves.

Answer 12

Ionosphere

Question 13

The process on which radio waves are reflected

Answer 13

Radio Propagation

Question 14

Low to Medium Frequency RW

Answer 14

• 30 kHz - 3MHz
• Transmissible through water, thus used in submarines and mine caves
• Most powerful LF is lightning

Question 15

Shortwave Frequency RW

Answer 15

• 1.7 MHz - 29.8 MHZ
• Used for broadcasting TV channels

Question 16

High Frequency RW

Answer 16

• 3 MHz - 30MHz
• Used in satellites

Question 17

Highest Frequency RW

Answer 17

• 30 MHz - 3 GHZ
• Used in GPS Systems, Cellphones, etc.

Question 18

Who discovered radio waves?

Answer 18

A german physicist named Heinrich Hertz proved its existence in the 1880s.

Question 19

How are radio waves discovered?

Answer 19

• Heinrich Hertz used a spark gap connected to an induction coil and a separate spark gap on a receiving antenna.
• When radio waves are transmitted by the coil and picked up by the receiving antenna, the spark would jump its gap as well.