टेलीविज़न

thumb|telivizan
Television telivizan (aangrezi:Television) ek vaijnanik upakaran hai. telivizan athava telivijan jan-sanchar ka drishy-shravy madhyam hai. dhvani ke sath-sath chitroan ke sajiv prasaran ke karan yah apane karyakram ko ruchikar bana deta hai. jisaka samooh par prabhavashali aur pratyaksh prabhav p data hai. telivizan mukhy roop se drishti-nirbandh ke siddhant par adharit hai. jis vastu ya vyakti ka bimb telivizan ke madhyam se prasarit karana hota hai, us par bahut tez prakash dala jata hai. vastu ya vyakti ki tasvir ko kram mean vibhakt kar chhote-chhote vibhinn ghanatvoan vale avayav mean badal diye jate haian tatha unaki sangat tarangoan ka madulan kar ek nishchit disha mean preshit dvara sancharit kiya jata hai. grahi dvara chhote-chhote usi kram mean in avayavoan ko jo dakar mool tasvir prapt kar li jati hai. jaisa ki hamari aankhoan ke samane ek sekend mean 20-25 kramik parivartan vale chitr ke gujarane par vah gatiman chitr ke roop mean dikhaee deta hai.

itihas

telivizan ka avishkar 1944 mean amerika ke vaijnanik j aaun l aaugi beyard ne kiya tha. bharat mean sarvapratham telivizan ka prayog 15 sitambar, 1959 ko dilli mean dooradarshan kendr ki sthapana ke sath hua. isaka vyapak prasar 1982 mean bharat mean ayojit eshiyad kheloan ke ayojan se hua. vartaman mean dooradarshan ki pahuanch 86% logoan tak hai jo isake madhyam se apana manoranjan karate haian.

vidhiyaan

telivizan prasaran ke lie mukhy roop se tin vidhiyaan prayog mean laee jati haian-

ayan mandal se rediyoan tarangoan ke paravartan dvara.
sookshm tarangoan ke prayog se kairiyar phrikvaiansi transamishan vidhi dvara.
rediyo tarangoan ke upayog par kritrim upagrah ke madhyam se.

kary pranali

vastav mean telivizan pranali dvara bheje gaye chitroan ko prapt karane ka ek sashakt madhyam hai. photo ilektranik prabhav ke dvara bimboan ki prakash kiranoan ko vidyut tarangoan mean parivartit kar diya jata hai. phir inhean sudoor sthanoan tak prasarit kiya jata hai. ye tarange telivizan set par phir chitroan mean badal jati haian. isi ke sath-sath rediyo pranali dvara dhvani tarangean bhi jati haian.

panne ki pragati avastha

adhar

prarambhik

madhyamik

poornata

shodh

tika tippani aur sandarbh

sanbandhit lekh

varnamala kramanusar lekh khoj

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