JEE Mains · Chemistry · STD 11 - 2. structure of atom
Heat treatment of muscular pain involves radiation of wavelength of about \(900\,nm.\) Which spectral line of \(H -\) atom is suitable for this purpose? \([{R_H} = 1 \times {10^5}\,c{m^{ - 1}},\,h\, = 6.6\, \times {10^{ - 34}}\,Js\,\,c = 3\,\) \(\times \,{10^8}\,m{s^{ - 1}}]\)
- A Paschen, \(\infty \, \to \,3\)
- B Paschen, \(5 \to 3\)
- C Balmer, \(\infty \, \to \,2\)
- D Lyman, \(\infty \, \to \,1\)
Answer & Solution
Correct Answer
(A) Paschen, \(\infty \, \to \,3\)
Step-by-step Solution
Detailed explanation
\([i]\,\,900\,nm = 9000\,\mathop A\limits^o \) It is in far infra red region hence paschen.
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