गाइगर मूलर काउण्टर

thumb|gaigar moolar kauntar (aangrezi:Geiger Muller Counter) gaigar moolar kauntar vaijnanik upakaran hai. is upakaran ki sahayata se rediyoan aiktiv srot ke vikiran ki ganana ki jati hai.

panne ki pragati avastha

adhar

prarambhik

madhyamik

poornata

shodh

sanbandhit lekh

a a i ee u oo e ai o au aan k kh g gh n ch chh j jh n t th d dh n t th d dh n p ph b bh m y r l v sh sh s h ksh tr jn rri rri aau shr aah