nPostednon February 13, 2015
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Thensubtitle of the day, according to the official website,nis “Celebrating radio…by youth, for youth…in safety andnsecurity.”
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nThenwebsite offers 10 fun ways to celebrate the day, an infographic aboutnyouth and radio, links, and graphics such as banners, logos, andnposters.
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Whethernyou listen to the World Radio Day broadcast, create your own radionshow, or hold a radio party, there are several interesting things tonconsider on this website…like the intersection of “radio” andn“internet.”
Whethernyou listen to the World Radio Day broadcast, create your own radionshow, or hold a radio party, there are several interesting things tonconsider on this website…like the intersection of “radio” andn“internet.” n
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nAs we have seen with TV and movies, radio is becomingnmore and more of a “streaming” thing in addition to a “broadcast”nthing.
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nWe can enjoy niche stations that only interest a smallnminority of people.
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nWe can create our own content and upload it tonSoundcloud. n
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Howndoes radio work?
Howndoes radio work?n
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nItnwould seem to make sense that radio waves would be a kind of soundnwave, but no. Actually, radio waves are more like visiblenlight!
Visible light and radio waves, along with things likeninfrared, ultraviolet, microwaves, and X-rays, are all forms ofnelectromagnetic radiation. They all travel through a vacuumn(essentially empty space, without air) at what we call the speed ofnlight. Radio waves are much, much bigger than light waves (in termsnof their wavelength).
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Soundnwaves, on the other hand, are a vibration of something – often, anvibration of air or water molecules, or a vibration of a piece ofnmetal or diaphragm. Sound waves cannot travel in a vacuum. And theyntravel much slower than light and radio waves…which is why you seenfar-away lightning before you hear its thunder.
Soundnwaves, on the other hand, are a vibration of something – often, anvibration of air or water molecules, or a vibration of a piece ofnmetal or diaphragm. Sound waves cannot travel in a vacuum. And theyntravel much slower than light and radio waves…which is why you seenfar-away lightning before you hear its thunder.n
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nOf course, our radios are designed to snatch radio waves and turn them into sound!
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nItnisn’t just AM/FM radios and ham radios that use radio waves; cordlessnphones, garage door openers, cell phones, TV remotes,nremote-controlled toys, GPS devices, satellite transmissions, WiFi,nand airplane controls all use radio waves.
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nHeren is an old (1943) movie aboutn how radio works, and here is a recentn video about how a crystal radio works.
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nAlsonon this date:
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Anniversary of the discovery of a missing manuscript
Anniversary of the discovery of a missing manuscript
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nTestnpilot Chuck Yeager’s birthday
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nNaturalistnJoseph Banks’s birthday
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nAnniversarynof the Treaty of Lisbon
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nArtistnGrant Wood’s birthday
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nPlannahead:
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nChecknout my Pinterest boards for:
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nFebruaryn holidays
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nFebruaryn birthdays
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nHistoricaln anniversaries in February
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nAndnhere are my Pinterest boards for:
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nMarchn holidays
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