radio

Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by a radio receiver connected to another antenna. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing and other applications.
In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking and satellite communication among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft and missiles, a beam of radio waves emitted by a radar transmitter reflects off the target object, and the reflected waves reveal the object's location. In radio navigation systems such as GPS and VOR, a mobile receiver receives radio signals from navigational radio beacons whose position is known, and by precisely measuring the arrival time of the radio waves the receiver can calculate its position on Earth. In wireless radio remote control devices like drones, garage door openers, and keyless entry systems, radio signals transmitted from a controller device control the actions of a remote device.
Applications of radio waves which do not involve transmitting the waves significant distances, such as RF heating used in industrial processes and microwave ovens, and medical uses such as diathermy and MRI machines, are not usually called radio. The noun radio is also used to mean a broadcast radio receiver.
Radio waves were first identified and studied by German physicist Heinrich Hertz in 1886. The first practical radio transmitters and receivers were developed around 1895-6 by Italian Guglielmo Marconi, and radio began to be used commercially around 1900. To prevent interference between users, the emission of radio waves is strictly regulated by law, coordinated by an international body called the International Telecommunications Union (ITU), which allocates frequency bands in the radio spectrum for different uses.

View More On Wikipedia.org
Recent contents

  1. INAUZWA Minara ya radio na simu

    Habari wakuu, kwa wanaohitaji Mnara wa radio au simu. Nauza mnara napatikana Mbezi, Kimara Suca. Dar es Salaam. Mnara una kila kitu chake. Machine zote. 0783985530

  2. Wasafi FM Sports : Yusuph Mkule anatia aibu redio yenu.

    Kwenye hili sakata la Mtibwa Sugar na madai yao juu ya Msheri kwa Yanga... Sakata lilianza jana jioni kwenye sports Court PAUL MKAI akiwa na GEORGE AMBANGILE(Mchambuzi Bora kwa sasa)...ikiwa tumesikiliza malalamiko ya THOBIAS KIFARU(Msemaji wa MTIBWA) kuwa bado wanawadai YANGA pesa za uhamisho...
  3. L

    Kutangaza kwa lugha nyingi na kukumbatia teknolojia kutadumisha umuhimu wa radio

    Na Ronald Mutie Tarehe 13 Februari ni Siku ya Radio Duniani, na Shirika la Elimu, Sayansi na Utamaduni la Umoja wa Mataifa (UNESCO) limechagua kauli mbinu ya Siku hiyo kuwa ni “Ndio kwa Redio, Ndio kwa Uaminifu”. Tafsiri yake ni kwamba, bado radio inaendelea kuwa chombo muhimu cha kupasha...
  4. F

    Kuhusu Mtangazaji Rebeka Mulesi wa Radio Free Africa

    Habari za Jumapili Wana wa JF. Mtangazaji Rebeka Mulesi wa Radio Free Africa amekuwa akitangaza kipindi Cha USHAURI WAKO kwa muda mrefu Sana. Kipindi hurushwa kila Jumapili asubuhi saa mbili hadi saa Tatu. Hapa huja watu wenye matatizo mbalimbali na kuelezea matatizo yao. Wengi ni wagonjwa...

  5. INAUZWA Sabufa aina ya Alitop

    Natuma ni wazima wa afya,Nilikuwa na naitaji kununua sabufa katika pita pita nimekutana nahii sabufa kwa mwenye kuifahamu vizuri anipe mrejesho kabla sijayavagaa
  6. B

    Tanzania, mmedhibiti mijadala kwenye radio na Televishen, wanaharakati na wapinzani wamehamia space na zoom mmewafuata kuomba mic; It's Shame

    Serikali na chama tawala wamedhibiti watu kusema na kujadiliana kwenye TV na Radio Kwa manufaa ya afya ya akili ya Watanzania. Wakafungia magazeti na baadhi ya online tv. Wakatunga sheria Kali na kuajiri TCRA wapambane na wakosoaji wa serikali. Kwa kuwa wanaozuiwa kusema ni wale wenye akili...

  7. Ilikuwa 1980 nchini Poland, mdau amekwenda kwenye music festival na radio cassette ili arecord nyimbo

    Ilikua Jarocin Festival, vijana na wanaharakati walii penda sana, ilikua inspiration kuachana na utawala wa ki communist na waliimba mabaya yakiyofanywa na viongozi.
  8. M

    Mtangazaji wa ITV na Radio One Farhia Middle umepewa Shilingi ngapi kwa Sifa ulizompa leo Waziri wa Maji Aweso?

    Yaani Dada yangu Farhia Middle hivi Waziri wa Maji Awesso kuwa 'Field' kuangalia Changamoto za upatikanaji wa Maji Mkoani Dar es Salaam ndiyo hadi Umsifu mpaka utake hata Kumkufuru Mwenyezi Mungu katika Kipindi chenu Kizuri cha Mazungumzo ya Familia cha leo ukiwa na Pacha wako Aboubakary Sadick...

  9. App gani nitapata radio ya Wasafi Fm?

    Achana na youtube, ni app gani ya radio naweza nikapata matangazo ya radio ya Wasafi Fm? Maan sisi wa huku mikoani tunateseka sana kumsikiliza George Ambangile

  10. Kwanini TBC wasifungue YouTube channel waweke nyimbo za zamani?

    Radio Tanzania/ TBC FM wao ndio Wana archive kubwa kabisa ya nyimbo za zamani, kwani bendi zote za muziki, vikundi vya taarab na kwaya vilirekodi kwenye studio za RTD. Kuna nyimbo nyingi sana hazipatikani YouTube wala sehemu yoyote Ile, hivyo Basi wapenzi wa muziki ya kwetu hatuna pa kulipata...
  11. C

    Nimezima East Africa Radio, kuna jamaa anasema Manara ndiye aliyeifanya Simba SC kuwa kubwa

    Nimezima na redio kabisa kuna jamaa anasema manara ndiye aliyeifanya simba kuwa kubwa na kwa sasa hamna kitu sababu mashabiki wengi wamemfata utopoloni. Hivi ile sheria ya kuwa na chetti kwa hawa watangazaji inaanza lini jamani Kipindi kinaitwa kipenga xtra zengwe, kama walevi vile
  12. L

    Hii imekaaje? Clouds Radio na EFM kuendesha kamari katika vipindi vyao?

    Kumekuwa na tabia watangazaji wa vipindi vya redio Clouds na E.fm kuchezesha kamari katika kila vipindi. Kwa nyakati tofauti watangazaji hao wamekuwa wanawashawishi wasikilizaji wao wawe mamilionea kwa kuwaambia watume pesa kwa namba wanazozitaja huku wakitaja dau. Mwisho wa vipindi huwapigia...

  13. Mkuu wa Wilaya ya Kilwa Amshusha kwenye Gari Mwandishi wa Habari wa Wapo Radio

    Anaandika mwandishi wa habari wa wapo Radio. Hapo wakati Tuna chati na Dc . Kama Alikuwa Hataki mimi niende katika Ziara yake Ni Vema Angesema kwamba Sitaki Mwandishi Namimi nisingepoteza Muda wangu . Maana kwa Majibu hayo niliamini kuwa Alikuwa Tayari mimi niwe nae katika ziara...
    • Linguistic
    • Thread
    • gari habari mkuu mkuu wa wilaya mwandishi mwandishi wa habari radio wapo wilaya
    • Replies: 39
    • Forum: Jukwaa la Siasa

  14. Radio Safina this is too much

    Maombi tumeanza saa tano usiku hadi sasa hivi yanaendelea na ni kila siku. Sasa hivi ndio mkurugenzi mkuu Daniel Lema kaingia na maombi mengine. Hapa shetani lazima aombe poo! Hongereni watu wa Arusha. Kwa maombi haya huwa mnalala kweli? Tupeane uzoefu. Watu wengi waliopiga simu na tatizo...

  15. Idriss, Juma Lokole na Dida mna kelele sana kwenye kipindi chenu

    Inaonekana watangazaji wengine wa radio wanaokotezwa tu hawana hata ethics za hizo kazi za utangazaji.Unakuta wapo watu wapo kwenye kipindi wanabishana kama wapo kwenye kilabu cha mataputapu hawawekeani hata utaratibu wa kuongea,watu wanabishana mpaka msikilizaji unaona kero unabadilisha...
  16. M

    Farhia Middle na Aboubakary Sadick wa Radio One wauchanachana Msukule mpya wa Mafurikoni Jangwani

    "Kuna Wanaume wengine Wana tabia za Kike Kike za kupenda Kuwasema Watu vibaya ambao wameishi na kufanya nao Kazi kana kwamba hawakuwa na Mazuri yao au Yeye nae hana Mapungufu yake. Tafadhali ukiachika nyamaza tu kwani Kutajataja Watu kunaonyesha jinsi gani unavyowakubali na ulivyoumia kutokuwa...
    • MINOCYCLINE
    • Thread
    • farhia middle jangwani mahiri mpya msukule radio watangazaji
    • Replies: 16
    • Forum: Jamii Sports

  17. Mwanasaikolojia mahiri wa Kipindi cha Mazungumzo ya Familia cha Radio One Dkt. Charity Xavery atoa Ukweli Mchungu

    Akizungumza 'mubashara' kabisa katika Kipindi Bora kabisa cha Mazungumzo ya Familia cha Radio One kinachoruka kila Siku za Jumapili kuanzia Saa 1 na Nusu asubuhi hadi Saa 4 Kamili asubuhi, Mwanasaikolojia Mwalikwa Dkt. Charity Xavery leo ametoa kitu Kiitwacho Ukweli Mchungu kwa Wasikilizaji...
  18. C

    Kuna pumba zinaongelewa sasa hivi East African radio kipindi cha michezo

    Dah inatisha kwa kweli wanachambua mshahara wa Messi kuna jamaa anasema kwamba mshahara wa mwezi wa Messi una finance bajeti ya nchi ya Tanzania, dah nimejisikia hata kulia inakuwaje watu ma genius kama sisi hatuna ajira halafu vilaza wako kwenye media wanaongea pumba. Eti bajeti ya tanzania ni...
  19. J

    Serikali yajielekeza kuondoa kabisa tatizo la usikivu wa radio ifikapo 2025

    SERIKALI YAJIELEKEZA KUONDOA KABISA TATIZO LA USIKIVU WA RADIO IFIKAPO 2025. Mpaka sasa asilimia 66 ya maeneo ya kijeografia yanapata mawasiliano Yafungua milango kwa wadau kutumia miundombinu ya Serikali Waziri wa Mawasiliano na Teknolojia ya Habari Mhe, Dkt. Faustine Ndugulile amesema...

  20. Wananchi Muleba waiomba Serikali kuwafikishia mawasiliano ya radio na simu

    WANANCHI MULEBA WAIOMBA SERIKALI KUWAFIKISHIA MAWASILIANO YA REDIO NA SIMU Wananchi wa Wilaya ya Muleba wameiomba Serikali kuwafikishia huduma za mawasiliano ya redio na simu wakati wa ziara ya kikazi ya Naibu Waziri wa Mawasiliano na Teknolojia ya Habari Mhandisi Kundo Mathew wilayani humo...
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…