Q32.Heat treatment of muscular pain involves radiation of wavelength of about 900nm. Which spectral line of H atom is suitable for this purpose? [RH = 1 × 105 cm−1 ⋅h = 6.6 × 10−34Js, c = 3 × 108 ms−1] (1) Paschen, ∞→3 (2) Paschen, 5 →3 (3) Balmer, ∞→2 (4) Lyman, ∞→1
What This Question Tests
This question tests the ability to calculate the wavenumber from a given wavelength and identify the corresponding transition in the hydrogen spectrum using the Rydberg formula.
Concepts Tested
Formulas Used
ν̄ = 1/λ
ν̄ = R_H (1/n₁² - 1/n₂²)
📚 NCERT Sections This Tests
12.5 — A Hydrogen Atom Initially In The Ground Level Absorbs A Photon,
Physics Class 12 · Chapter 12
12.5 A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.
12.8 — A 12.5 Ev Electron Beam Is Used To Bombard Gaseous Hydrogen At
Physics Class 12 · Chapter 12
12.8 A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. What series of wavelengths will be emitted?
12.3 — A Difference Of 2.3 Ev Separates Two Energy Levels In An Atom. What
Physics Class 12 · Chapter 12
12.3 A difference of 2.3 eV separates two energy levels in an atom. What is the frequency of radiation emitted when the atom make a transition from the upper level to the lower level?
📋 Question Details
- Chapter
- Atomic Structure
- Topic
- Hydrogen spectrum (Rydberg formula)
- Year
- 2019
- Shift
- 11 Jan Shift 1
- Q Number
- Q32
- Type
- MCQ
- NCERT Ref
- Class 11 Chemistry Ch 2: Atomic Structure
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