Q28.The de-Broglie wavelength associated with the electron in the n = 4 level is: (1) Half of the de-Broglie wavelength of the electron (2) Four times the de-Broglie wavelength of the in the ground state electron in the ground state (3) 1 th of the de-Broglie wavelength of the electron (4) Two times the de-Broglie wavelength of the 4 in the ground state electron in the ground state
What This Question Tests
This question combines the de-Broglie hypothesis with Bohr's model of the atom to find the relationship between the de-Broglie wavelength of an electron and its principal quantum number.
Concepts Tested
Formulas Used
λ = h/p
mvr = nh/(2π)
r_n ∝ n²
v_n ∝ 1/n
📚 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.
12.7 — 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?
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?
📋 Question Details
- Chapter
- Atoms
- Topic
- De-Broglie Wavelength in Bohr's Model
- Year
- 2015
- Shift
- 11 Apr Online
- Q Number
- Q28
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 12: Atoms
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