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JEE Mains · Physics · STD 12 - 12. atoms

यदि रिडबर्ग नियतांक \(\mathrm{R}\) हो तो पाश्चन श्रेणी में विकिरण की सबसे बड़ी तरंगदैर्ध्य \(\frac{\alpha}{7 \mathrm{R}}\) होगी, जहाँ \(\alpha=\) . . . . . . |

  1. A \(144\)
  2. B \(155\)
  3. C \(188\)
  4. D \(120\)
Verified Solution

Answer & Solution

Correct Answer

(A) \(144\)

Step-by-step Solution

Detailed explanation

Longest wavelength corresponds to transition between \(n=3\) and \(n=4\) \( \frac{1}{\lambda}=R Z^2\left(\frac{1}{3^2}-\frac{1}{4^2}\right)=R Z^2\left(\frac{1}{9}-\frac{1}{16}\right) \) \( =\frac{7 R Z^2}{9 \times 16} \)…
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