Radio history
- 2. l誰狸hlaf.aixfoaYhlatla ;eklisg ;j;a ;eklghe炭hyelaflaflfiaohkak ms<sn fidhd .ekSu;aiu .=jka炭耽,sudOHfhab;sydihwdr誰Nf探臓17 jkishjfiais叩hdhehs ms<s.efkk yshqcskaia (Hugens) keue;smqoa.,hdtla;rdkHdhlawkqjwdf,dal ;rx. ud,djlawjldYhgfhduqlsfukamiqth .=re fldgf.ktla ;eklisg ;j;a ;eklgixfoaYhlahe炭hyelsnjfidhd .kakd,則臓fulSisoaOdka;hmok誰lr .ks単kauhsl,a *erf但(Michael Faraday) 炭iska炭袖q;apq誰Nlw;ayodne,S誰is耽 lf<ah臓1873 則 fc誰ia la,d他la uelaiaf探,a (Jemes Clerk Maxwell) th .Ks;uhisoaOdka;hlanjgm;a lf<ah臓(C)Prarthana Weerasinghe 11/01/2011
- 5. y他iaf.a fidhd .ekS誰j,g .re lsulajYfhka .=jka炭耽,s ;rx. ixLHd;hm%ldYlsf誰cd;Hka;rm%単;sh 賊la湛uid Tyqf.akufl叩lrHzf,iNd炭;dlr ;sf鱈臓 1897 oS炭,sh誰larEia(William Crooks) keue;a;d m<uqjrg炭袖q;apq誰Nl ;rx. u.ska ix{d he炭hyelsnjfmkajdfoa臓.=jka炭耽,shka;%h fidhd .ekSf誰 f.!rjhys単jkafkab;d,scd;sl.=.a,sfuda ud他fldaks gh臓Tyq /yekarys;j ix{d he炭hyelsnjfidhd .;a w;rDot & Dashfyj;a ;s;aiyb u.ska ikaksf探oklghq;= is耽jk /yekarys; fg,s .d%*a l%uhb;d,srchg ykajdoqkafka h臓(C)Prarthana Weerasinghe 11/01/2011
- 7. 1897 uehs 20fjksod ud他fldaks Wireless Signaling Companyk単ka iud.ula msysgq湛 h臓 fuuiud.f誰uQ,slwruqKjQfhaikaksf探oklghq;= id jh他,ia WmlrKksmo湛uhs臓1912 則 w;a,dka;slaid.rfha .uka .ks単ka ;snQTitanicfk!ldj ihqf他 md湛 wd whsia l=叩hlyemS .sf,kakgjQfudfydf;atysis叩u.SkagwdOdrb,a,dis叩fha ud他fldaks ikaksf探okWmlrKNd炭;fhks臓Titanicis耽湛u;aiu. jh他,ia ikaksf探okh ms<sn| uOHwjOdkhfhduqjkakg炭h臓f,dalfha m<uqf,dal .=jka炭耽,suOHia:dkhwdr誰NjQfha1920 fkdje誰n他 20fjksod h臓 thKDKAk単kawdr誰N炭hbkamiqRadio Network^.=jka炭耽,scd,d& wdr誰N炭h1922 BBC1935 則Edwin H. Armstrong炭iskaAM ;rx. fjkqjgFM (Frequency Modulation)fyj;aixLHd; uQ他ck ykajdfoa臓(C)PrarthanaWeerasinghe 11/01/2011
