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Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of light.
Radio waves
Radio waves are a form of electromagnetic radiation, created whenever a charged object (in normal radio transmission, an electron) accelerates with a frequency that lies in the radio frequency (RF) portion of the electromagnetic spectrum. In radio, this acceleration is caused by an alternating current in an antenna. Radio frequencies occupy the range from a few tens of hertz to a few hundred gigahertz.
| ELF - SLF - ULF/VF - VLF - LF/LW - MW - HF/SW - VHF - UHF - SHF - EHF Electromagnetic radio spectrum |
Electromagnetic spectrum and diagram of radio transmission of an audio signal.
Electromagnetic radiation travels (propagates) by means of oscillating electromagnetic fields that pass through the air and the vacuum of space equally well, and does not require a medium of transport (such as the aether). When radio waves pass an electrical conductor, the oscillating electric or magnetic field (depending on the shape of the conductor) induces an alternating current and voltage in the conductor. This can be transformed into audio or other signals that carry information. The word 'radio' is used to describe this phenomenon, and television, radio, radar, and cell phone transmissions are all classed as radio frequency emissions.
More on [ Radio ]
Las intros de los programas de 90.9 son malas, pero la de la hora alfa -radio es pésima.. Vámonos a reactor en lo que pasa... Buuuu
aliviane (Homero Fernandez) Mon, 04 Jan 2010 20:03:04 -0000
Las intros de los programas de 90.9 son malas, pero la de la hora alfa -radio es pésima.. Vámonos a reactor en lo que pasa... Buuuu
Welcome NEW followers!! 117+ hrs of #Ambient, #NewAge, #Spacemusic & #Electronica #music #radio Listen here: http://bit.ly/4fKdp Live365.com
AstreauxWorld (Astreaux World) Mon, 04 Jan 2010 20:03:02 -0000
Welcome NEW followers!! 117+ hrs of #Ambient, #NewAge, #Spacemusic & #Electronica #music #radio Listen here: http://bit.ly/4fKdp Live365.com
@marylee13 Are u aware that Highway radio on XM is reporting that Carrie is performing at the PCA on Wed.
Dustin2008 (Dustin Burton) Mon, 04 Jan 2010 20:03:01 -0000
@marylee13 Are u aware that Highway radio on XM is reporting that Carrie is performing at the PCA on Wed.
@LaVarArrington welcome back LaVar hope your Xmas and New years was good! looking forward to good radio again this year
Regionalceleb (Shawn Humberger) Mon, 04 Jan 2010 20:02:57 -0000
@LaVarArrington welcome back LaVar hope your Xmas and New years was good! looking forward to good radio again this year
@RNC Chairman Steele on @seanhannity radio at 5pm EST today, tune in! http://bit.ly/d2UbI
mollybrynn (Molly Cullen) Mon, 04 Jan 2010 20:02:53 -0000
@RNC Chairman Steele on @seanhannity radio at 5pm EST today, tune in! http://bit.ly/d2UbI
@irisita69 I know but though you would love my fav radio station is in Israel!
DerekSheldon (Derek Sheldon) Mon, 04 Jan 2010 20:02:53 -0000
@irisita69 I know but though you would love my fav radio station is in Israel!
Brilliant Idiot: Where God Went Wrong - Radio play with the main character wandering in the afterlife, searching for a quiet cup of tea, aided by bizarre characters. Clean, family oriented, non-commercial humor reminiscent of Douglas Adams / Python.
Classics for Kids - Information on current and past shows, games, orchestra instruments, games, downloadable classics, and list of stations that carry it.
Crazy Dave's Kid Show - Includes archives of previous shows, activities, surveys, fan art, commercials, and the theme song.
Meta Description: [ Crazy Dave's Kid Show Website, the official website of the top-rated children's radio program in central Iowa. ]
Edge 88 FM - Grand View College Radio - Kids Radio Mania is the all weekend radio programming for kids ages 2 to 13. Includes pre-teen pop music, favorite kids songs, jokes, and prizes.
Family Groove - A kids internet radio show built on the intention of creating a bridge to allow kids a smooth transition in the growth of their awareness and appreciation of music.
HIS Kids Radio - Full-time Christian radio just for kids. Site includes live Internet broadcasts, program schedule, news, audio files, and links.
Karen and Kids - From WRBS in Baltimore, Maryland, this show offers children's Christian music and stories. Find out how to join the Kids Club, contact Karen, and listen to audio clips of songs.
Meta Description: [ Karen & Kids - Karen Mortimer & a great group of kids - sing award-winning educational, Bible-based songs sure to become your kid's favorites, available on 11 studio-recorded CDs! ]
Kid's Time - Features stories, poems, and songs written and recorded by listeners and available at CFRU 93.3 FM.
Meta Description: [ Kid s Time radio show broadcasts over the airwaves and the internet every Saturday. Positive messages. New theme each week. ]
Kids Internet Radio Project - Provides opportunities to produce a streaming internet radio show. Includes a monthly contest where you compete against other kids to produce the most appealing show.
Meta Description: [ Internet Radio Project provides youth a venue for internet radio broadcasting and podcast production, through K-12 school and classroom settings, club production and afterschool programs ]
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London Live and Direct - A 24/7 underground dance music site focusing on the United Kingdom, with a live dj booth webcam, music, and dj profiles.
New York Kids - Two-hour broadcast just for kids airs Sunday nights on New York stations. Offers current and previous broadcasts in RealAudio format, as well as activities, puzzles, games, and message board.
PowerTalk FM - Teen Talk Radio hosted by Michael Ray and Ralphy, the PowerTalk Dawg.
Radio Disney - An online and on-air radio network for kids and the kid in all of us. Listen to the latest music from popular stars and make special requests. The official site for Disney Radio.
Meta Description: [ Radio Disney.com is your online destination for cool new music, Disney music, music videos, prizes, games and more! Broadcasting all over the United States, Radio Disney brings together listeners with music from Hilary Duff, B5, Jesse McCartney and the cast of High School Musical! ]
Radio KOL - Airs live online every weekday afternoon from 3-7pm EST and rebroadcasts all day long with song requests, celebrity guests, giveaways and looney calls.
Meta Description: [ Airs live online every weekday afternoon from 3-7pm EST and rebroadcasts all day long with song requests, celebrity guests, giveaways and looney calls. ]
Radio Mystery Theater - A fan site that discusses the classic radio show. Includes information, a message board, an FAQ, episode guide, and sound bites.
Meta Description: [ for fans and collectors of the cbs radio mystery theater, this site has info, sounds, stories and more. ]
Takeover Radio - UK station written, produced, presented and run entirely by kids aged 8-14. Site includes history, virtual studio tour, and information for those wanting to participate.
Meta Description: [ Takeover Radio is a children's radio station run by kidz age between 8 and 14 years old on the internet across the world. Une station par radio pour des enfants était offensée par des gosses âgés entre 8 et 14 ans. Takeover Radio ist ein Radiostationdurchlauf der Kinder durch die Zicklein, die ge... ]
TeenTalk Radio - A weekly internet broadcast hosted by teens for teens needing advice on all topics.
Tell Us a Tale - The official site from host Peter Jones that includes a biography, performance calendar, and downloadable audio.
Meta Description: [ Tell Us A Tale, the only children's radio program in Central Virginia, is heard every Sunday from noon to 2 pm on WTJU 91.1 FM. ]
The Making A Difference Christian Radio Show - Information on the MAD, how to hear it, a blog, and how to enter and win contests.
Meta Description: [ _your description goes here_ ]
The Pond Radio Show - A children's radio show that teaches good values through comedy. Episodes available online and a list of stations that carry the show.
Meta Description: [ A children's radio show that teaches good values through comedy. Episodes available online and a list of stations that carry the show. ]
Youth Radio - A station created by young people training for careers in media. The station covers music, news, issues and invites listeners to participate.
ZJAM - A national youth radio show playing Christian rock/alternative music and discussing a different topic each week. Has a Bible study, chat, contests, games, top 25, and a broadcast schedule.
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