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हाइड्रोजन परमाणु के बामर श्रेणी की सबसे कम तरंगदैर्घ्य वाली रेखा का तरंगदैर्घ्य ज्ञात कीजिए । यह तरंगदैर्घ्य विद्युत चुंबकीय वर्णक्रम के किस क्षेत्र में स्थित हैं ?

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बामर श्रेणी की सबसे छोटी तरंगदैर्घ्य के लिए
`n_(1) = 2 "व" n_(2) = oo`
`(1)/(lamda) = R [(1)/(2^(2)) - (1)/(oo)] = (R)/(4)`
या `lamda = (4)/(R) = (4)/(1*097 xx 10^(7))m `
` = 3*646xx10^(-7)m`
`=3646 Å`.

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