टेलीविज़न  हिन्दी देवनागरी में पढ़ें।

telivizan
Television

telivizan (angrezi:Television) ek vaigyanik upakaran hai. telivizan athava telivijan jan-snchar ka drishy-shravy madhyam hai. dhvani ke sath-sath chitron ke sajiv prasaran ke karan yah apane karyakram ko ruchikar bana deta hai. jisaka samooh par prabhavashali aur pratyaksh prabhav padata 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 men vibhakt kar chhote-chhote vibhinn ghanatvon vale avayav men badal diye jate hain tatha unaki sngat tarngon ka madulan kar ek nishchit disha men preshit dvara sncharit kiya jata hai. grahi dvara chhote-chhote usi kram men in avayavon ko jodakar mool tasvir prapt kar li jati hai. jaisa ki hamari ankhon ke samane ek sekend men 20-25 kramik parivartan vale chitr ke gujarane par vah gatiman chitr ke roop men dikhaee deta hai.

itihas

telivizan ka avishkar 1944 men amerika ke vaigyanik jaaun laaugi beyard ne kiya tha. bharat men sarvapratham telivizan ka prayog 15 sitambar, 1959 ko dilli men dooradarshan kendr ki sthapana ke sath hua. isaka vyapak prasar 1982 men bharat men ayojit eshiyad khelon ke ayojan se hua. vartaman men dooradarshan ki pahunch 86% logon tak hai jo isake madhyam se apana manornjan karate hain.

vidhiyan

telivizan prasaran ke lie mukhy roop se tin vidhiyan prayog men laee jati hain-

  1. ayan mandal se rediyon tarngon ke paravartan dvara.
  2. sookshm tarngon ke prayog se kairiyar phrikvainsi transamishan vidhi dvara.
  3. rediyo tarngon ke upayog par kritrim upagrah ke madhyam se.

kary pranali

vastav men telivizan pranali dvara bheje gaye chitron ko prapt karane ka ek sashakt madhyam hai. photo ilektranik prabhav ke dvara bimbon ki prakash kiranon ko vidyut tarngon men parivartit kar diya jata hai. phir inhen sudoor sthanon tak prasarit kiya jata hai. ye tarnge telivizan set par phir chitron men badal jati hain. isi ke sath-sath rediyo pranali dvara dhvani tarngen bhi jati hain.


panne ki pragati avastha
adhar
prarambhik
madhyamik
poornata
shodh

tika tippani aur sndarbh

snbndhit lekh

varnamala kramanusar lekh khoj

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