Q32.The de Broglie wavelength (λ) associated with a photoelectron varies with the frequency (v) of the incident radiation as, [v0 is threshold frequency]: 1 (1) λ ∝ 1 (2) λ ∝ 1 (v−v0) 4 (v−v0) (3) λ ∝ 1 3 (4) λ ∝ 1 1 (v−v0) 2 (v−v0) 2
What This Question Tests
This question tests the ability to combine Einstein's photoelectric equation with the de Broglie wavelength formula to find the relationship between wavelength and incident radiation frequency.
Concepts Tested
Formulas Used
K = hν - hν₀
λ = h/√(2mK)
📚 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.
11.6 — The Threshold Frequency For A Certain Metal Is 3.3 × 1014 Hz. If Light
Physics Class 12 · Chapter 11
11.6 The threshold frequency for a certain metal is 3.3 × 1014 Hz. If light of frequency 8.2 × 1014 Hz is incident on the metal, predict the cut- off voltage for the photoelectric emission.
11.8 — Light Of Frequency 7.21 × 1014 Hz Is Incident On A Metal Surface.
Physics Class 12 · Chapter 11
11.8 Light of frequency 7.21 × 1014 Hz is incident on a metal surface. Electrons with a maximum speed of 6.0 × 105 m/s are ejected from the surface. What is the threshold frequency for photoemission of electrons?
📋 Question Details
- Chapter
- Atomic Structure
- Topic
- de Broglie wavelength and Photoelectric effect
- Year
- 2019
- Shift
- 11 Jan Shift 2
- Q Number
- Q32
- Type
- MCQ
- NCERT Ref
- Class 11 Chemistry Ch 2: Atomic Structure
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