resultofmanyscientists'research. In18881888,GermanscientistHertzdiscoveredtheexistence ofradiowaves.In1895,RussianphysicistPopovclaimedthat, in1895,600yardsapart,RussianphysicistPopovclaimedto havesuccessfullysentandreceivedradiosignalsat600yards apart.Laterthesameyear,awealthyItalylandlord'ssonwas ...
This property of radio waves that we have described as "filling space" leads not only to broadcast, but to the last and newest form of radio communications. It allows us to reach a particular person "anytime, anywhere," and since the antenna can move through that space while sending or ...
Beginning at the early days of spark-gap transmitters, this tale touches on the emergence of radio and television broadcasting, as well as radio navigation and radar, before moving on to the rise of satellite, near-field and light-based communications. Finally, the development of wireless home ...
Further experiments revealed that the pattern of the electrons was determined by the crystal structure of the nickel target, not the intrinsic atomic structure of nickel. Comparison with the energies of X-rays striking the same target indicated that the electrons were behaving as waves, not ...
waveswerenotofparticularinteresttotheintellectuals, exceptfortheintellectuals'challengetotheirdiscovery,his discoverieswereeventuallyappliedtothedevelopmentofhuman radio.Thegameisgoingon. OneoftheparticipantsinthegamewastheyoungItalianG. Marconiwhodevelopedtheradio.Hewasaboywithastrong interestinphysicsandelectricalsci...
I worked there in late 1970 thru 1972 as my first radio station. I was fresh out of high school and had a friend quit the station, so I got a job for $1.60 an hour...by the way, in 2 years I never got a raise, nor even asked for one, I loved radio so much. It was owne...
1892automaticfoldingdesktelephone(自动折叠式桌面电话）HomeHotelTelephonebooth 1907GermantypetelephoneItreplacedelectromagnetictelephonebyradiowaves 1950srotarydialtelephone 1990scordlesstelephone 1960spicture-phone 1980stouchtonetelephone ThefirstmobilephoneMotorolaDynaTACinventedbyMartinCooperin1973.4 ...
Until about 1950, listening to the radio often was marred by noise and interference, and reception sensitivity was not very high. But once ferrite cores came into use, the noise decreased and the sound became clearer, allowing more people to listen and to obtain a wide range of information....
As Xi Jinping, general secretary of the CPC Central Committee, has rightly stated, the people are the "supreme and ultimate judge" of the Party's work. The effectiveness of all the work of the CPC should ultimately be measured by the real benefits the people have reaped, by the ...
co-founder of influential Manchester-based indie label Factory Records. Despite having relatively little art direction experience under his belt, Saville was behind iconic covers such as Joy Division’s “Unknown Pleasures” (1979), depicting the radio waves emitted by a rotating star, and the brim...