0
The really nice thing about radio waves is that they will make the electrons in a piece of copper wire move; this means that they generate electric currents in the wire. In fact it works both ways: alternating currents in a copper wire generate electromagnetic waves, and electromagnetic waves generate alternating currents. The electric currents at "radio frequencies" (rf) are used by radio and television transmitters and receivers. I use frequencies of 145MHz (VHF), 14MHz (20m HF) and 3.7MHz (80m HF).
Wiki User
∙ 15y ago
Wiki User
∙ 12y ago1. Radio waves are electromagnetic in nature.
2. In a vacuum, radio waves travel very nearly as fast as light does.
3. Radio waves have both a wavelength (distance between any two waves that are next to each other) and a frequency (The number of waves per second. In Radio and Electronics the frequency is expressed in Hertz (Hz) units, but in mechanical things, like clocks, frequency is expressed in CPS (Cycles per second.)
'Hertz' is capitalized because it was named after a person.
4. Strong radio waves with super-high frequencies can warm up things with water in them. (Hopefully, not your arm or head!)
Wiki User
∙ 11y agoA radio wave is one of the longest waves in the Electromagnetic Spectrum
Wiki User
∙ 13y agoElectromagnetic radiation.
Add your answer:
Earn +20 pts
Who discoverd radio waves?
Guglielmo Marconi (Marchese Guglielmo Marconi), an Italian inventor, proved the feasibility of radio communication. He sent and received his first radio signal in Italy in 1895. By 1899, he flashed the first wireless signal across the English Channel, and two years later received the letter "S", telegraphed from England to Newfoundland. This was the first successful trans-Atlantic radiotelegraph. Wikipedia has a good article on this Nobel Prize winner, and a link is provided.
What two properties of electromagnetic waves are used to attach info to radio signals?
By varying the amplitude of a radio wave, you can encode information. That is how AM radio works. By varying the frequency (and hence its wavelength) of a radio wave, you can also encode information. That is how FM radio works. A good graphical explanation is given at http://cbdd.wsu.edu/kewlcontent/cdoutput/TR502/page21.htm There are actually FOUR properties. Frequency and amplitude have already been covered. You can also affect the phase of the wave; this isn't very popular because recovering it in the receiver isn't easy, but it's out there. You can also attach information by the presence or absence of the wave. This is how Morse code is sent.
Can long waves such as radio waves are good for transmitting information long distance?
Because it's cheap and easy to generate radio waves, add information to them, detect them at great distances, separate one from out of many, and recover the information carried by the one you want. Plus, they cover the distance from one place to another quite rapidly.
Why can't radio waves pass through the ionosphere?
Yes, they can in high levels. Science says radiowaves can vibrate our skin and if strong enough can actually massage or promote bloodflow. Blood is the vessel and/or vehical for oxygen transport. A high enough oxygen level is not only dangerous but deadly.
Are radio waves made up of matter?
Radio waves are electromagnetic waves, which consists of electric & magnetic fields. When they hit matter they exert forces on the charges of the atoms that make up the matter. Radio waves are usually pretty weak so when they hit most materials not much happens because the atomic charges are pretty firmly in place. However, in metals some of the atomic electrons are not firmly in place and will be easily moved by a radio wave. This is why antennas work. The radio wave causes currents in the antenna which can be sent to a circuit which can convert the currents into the information that was sent by the radio wave (TV & Radio), if it was carrying information.
Do walkie talkies use radio waves?
Yes. A good rule of thumb is that if the device has an antenna, it uses radio waves. An antenna would not be needed if it didn't use radio waves.
Radio waves are reflected by the?
Good conductors like metals, the ionosphere, etc.
Who discoverd radio waves?
Guglielmo Marconi (Marchese Guglielmo Marconi), an Italian inventor, proved the feasibility of radio communication. He sent and received his first radio signal in Italy in 1895. By 1899, he flashed the first wireless signal across the English Channel, and two years later received the letter "S", telegraphed from England to Newfoundland. This was the first successful trans-Atlantic radiotelegraph. Wikipedia has a good article on this Nobel Prize winner, and a link is provided.
How are radio waves affected in the atmosphere?
I dont think they do, Radio waves diffract less and arn't affected by the ionosphere which is the upper part of the atmosphere. Most electromagnetic waves are affected severely by the atmosphere, which is a good thing due to the strength they carry EXCEPT microwaves *Apparantly*.
What are good and bad effects of FM radio?
Some good effects of FM radio is that people have access to free news, music, and can be alerted to emergencies. One possible bad effect of FM radio is that some scientist think radio waves may be bad for humans.
Is vacuum a good conductor?
A good conducter of what? A vaccum contains nothing, no gas, no matter, no sub-atomic particles so it cannot conduct anything. But particles and waves can travel through it, like light or radio waves.
What two properties of electromagnetic waves are used to attach info to radio signals?
By varying the amplitude of a radio wave, you can encode information. That is how AM radio works. By varying the frequency (and hence its wavelength) of a radio wave, you can also encode information. That is how FM radio works. A good graphical explanation is given at http://cbdd.wsu.edu/kewlcontent/cdoutput/TR502/page21.htm There are actually FOUR properties. Frequency and amplitude have already been covered. You can also affect the phase of the wave; this isn't very popular because recovering it in the receiver isn't easy, but it's out there. You can also attach information by the presence or absence of the wave. This is how Morse code is sent.
What waves broadcast radio signals?
Radio waves are a form of electromagnetic energy. Radio receivers interpret this information by converting the frequency (how many cycles of the wave pass a point in a given amount of time) or the amplitude (the strength of a wave). These are called FM and AM radio stations or frequency modulation and amplitude modulation. These waves are often as long as buildings. They are good for broadcasting information because lower frequency waves are usually better at penetrating obstacles like roads, trees and anything between the transmitter and the receiver. Hope this helps, Shane
Can long waves such as radio waves are good for transmitting information long distance?
Because it's cheap and easy to generate radio waves, add information to them, detect them at great distances, separate one from out of many, and recover the information carried by the one you want. Plus, they cover the distance from one place to another quite rapidly.
Why can't radio waves pass through the ionosphere?
Yes, they can in high levels. Science says radiowaves can vibrate our skin and if strong enough can actually massage or promote bloodflow. Blood is the vessel and/or vehical for oxygen transport. A high enough oxygen level is not only dangerous but deadly.
What was discovered recently DNA pulsars quasars atomic power or radio waves?
None of them. They were all discovered a good many years ago.
What wave broadcast a radio signal?
Radio waves are a form of electromagnetic energy. Radio receivers interpret this information by converting the frequency (how many cycles of the wave pass a point in a given amount of time) or the amplitude (the strength of a wave). These are called FM and AM radio stations or frequency modulation and amplitude modulation. These waves are often as long as buildings. They are good for broadcasting information because lower frequency waves are usually better at penetrating obstacles like roads, trees and anything between the transmitter and the receiver. Hope this helps, Shane
