
paramanu samay-seema

khagol bhautiki mein, paramanu samay-seema kewal eendhan kii khapat kii darr key aadhar parr ack taare key jivankal kaa anuman haye. thermal aur free-faul (urf dynamic) samay paimaane key saath, iska upayog yeh anuman lagaane key liye kiya jaataa haye kii ack vishesh taaraa apane jeevan key ack nishchit charan mein kitna samay rahega aur yadi kaalpanik sthitiyon koo puuraa kiya jaataa haye tou iska jivankal kitna hoga. vaastav mein, ack taare kaa jivankal paramanu samay paimaane dwara anumaanit jivankal seey adhik hotaa haye kyonki jaise-jaise ack eendhan durlabh hoe jaataa haye, doosara aam taur parr apani jagah leey legaa-hydrogen jalane seey helium jalane aadi kaa maarg prashast hotaa haye. haalaanki, hydrogen jalaane key baad sabhi charanon koo sanyukt roop seey hydrogen jalaane kii avadhi kaa 10 pratishat seey bhee cumm jodd diyaa jaataa haye.
taarakiya khagol bhautiki.
hydrogen aam taur parr ack taare key paramanu jivankal koo nirdhaarit kartaa haye kyonki iska upayog mukhya anukram taare mein eendhan key mukhya srot key roop mein kiya jaataa haye. taaron key bheetar honey vaali paramanu pratikriya mein hydrogen helium bunn jaataa haye; jaba hydrogen samaapt hoe jaataa haye, tou taaraa apane jeevan key dusare charan mein chalaa jaataa haye aur helium koo jalaana shuru curr detaa haye. 
sootra _ 1
jahan m taaron kaa dravyamaan haye, x taaron kaa ansh haye (dravyamaan dwara) joe eendhan seey banaa haye, l taaron kii chamak haye, q paramanu sanlayan seey eendhan key prati dravyamaan jaari oorjaa haye (rasayanik sameekaran kii jaanch kii jaani chaahiye iss moolya koo praapt karane key liye), aur f usa taare kaa ansh haye jahan eendhan jalaaya jaataa haye (f aam taur parr. 1 yaa usake barabar hotaa haye). udaaharan key liye, soorya kaa paramanu samay paimana lagbhag 10 arab varsh haye.

