निम्नतम अवस्था में विद्यमान एक हाइड्रोजन परमाणु एक फोटॉन को अवरोपित करता है जो इसे \( n=4 \) स्त...

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निम्नतम अवस्था में विद्यमान एक हाइड्रोजन परमाणु एक फोटॉन को अवरोपित करता है जो इसे \( n=4 \) स्तर तक उत्तेजित कर देता है। फोटॉन की तरंगदरैर्य तथा आवृत्ति ज्ञात कीजिए।
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