प्रकाश वर्ष
prakash varsh (aangrezi: Light year) khagoliy doori ka vah ikaee hai, jo ki ek sal mean prakash dvara tay ki gee doori ke barabar hai. prakash varsh khagoliy doori ka matrak hai. chooanki brahmand itana b da aur vishal hai ki ham isaki doori kilomitar mean nahian nap sakate. isalie grahoan aur taroan ki doori napane ke lie ek alag matrak ki jaroorat p dati hai jise prakash varsh kahate haian.
- agar ham khagoliy doori ko prakash varsh mean nahi napean to hamari prithvi se najadiki tare ki doori 38,000,000,000,000 kilomitar hogi. ye to soory ko chho dakar prithvi se sabase najadiki tare ki doori hai, ab soch lijiye ki sabase door tare ki doori kilomitar mean kya hogi. shayad ham ganana bhi na kar payean. isalie is pareshani ko door karane lie prakash ka istemal karate hai.
- prakash varsh se kisi tare ki umr ka bhi pata laga sakate haian? jitane bhi tare asaman mean dikhaee dete haian vo abhi vaise nahi haian jaisa hamane dekha hai. balki ham vartaman na dekhakar bhootakal mean haian. kyoanki kuchh tare prithvi se itane door haian ki unaka prakash prithvi par hajaroan, lakhoan prakash varsh ke bad pahuanchata hai. agar hamane kisi tare ko dekha jo ki 1 prakash varsh ki doori par hai to yah man lijiye ki ham us tare ko 1 sal pahale jaisa tha vaisa dekh rahe haian aur abhi jaisa hai vaisa nahian.
yadi vah tara 1000 prakash varsh ki doori par hai to ham us tare ko 1000 sal pahale jaisa tha, vaisa dekh rahe haian. kyoanki us 1 hazar prakash varsh door tare ke prakash ko prithvi par pahuanchate pahuanchate 1000 sal lag gaye. is prakar yah vichar kiya ja sakata hai ki brahmand itana b da hai ki yahaan prakash varsh bhi phika p d jata hai lekin chooanki 1 prakash varsh ki doori tay kar kisi najadiki grah par jana hi hamare lie mushkil kam hai.
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tika tippani aur sandarbh
sanbandhit lekh
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varnamala kramanusar lekh khoj
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