Q26.The shortest wavelength of H atom in the Lyman series is λ1 . The longest wavelength in the Balmer series of He+ is : (1) 36λ1 (2) 5λ1 5 9 (3) 9λ1 (4) 27λ1 5 5
What This Question Tests
This question tests the application of the Rydberg formula for calculating wavelengths in atomic spectra for different series and atoms, requiring specific knowledge of transition definitions.
Concepts Tested
Formulas Used
1/λ = RZ² (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?
12.7 — The Radius Of The Innermost Electron Orbit Of A Hydrogen Atom Is
Physics Class 12 · Chapter 12
12.7 The radius of the innermost electron orbit of a hydrogen atom is 5.3×10–11 m. What are the radii of the n = 2 and n =3 orbits?
📋 Question Details
- Chapter
- Atoms
- Topic
- Hydrogen spectrum, Bohr model
- Year
- 2020
- Shift
- 04 Sep Shift 2
- Q Number
- Q26
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 12: Atoms
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