Discussion Overview
The discussion revolves around calculating the De Broglie wavelength of an electron with a kinetic energy of 40 eV. Participants are seeking assistance with the problem, which is related to homework and exam preparation in quantum mechanics.
Discussion Character
- Homework-related, Mathematical reasoning
Main Points Raised
- One participant presents an initial calculation of the De Broglie wavelength as 3.9 x 10^-10 m but expresses uncertainty about its correctness.
- Another participant references a source suggesting that the wavelength should be half of the initial calculation, prompting a check of the equations used.
- A third participant emphasizes the need to use two specific formulas: one relating kinetic energy to momentum and mass, and another relating momentum to wavelength, suggesting a potential error in the initial calculation.
- A fourth participant proposes a different value of 1.85079 x 10^-25 m based solely on the input of the kinetic energy, without considering mass or velocity.
- Another participant requests to see the calculations to better understand the discrepancies in the answers provided.
Areas of Agreement / Disagreement
There is no consensus on the correct answer, as participants present differing calculations and interpretations of the formulas involved. The discussion remains unresolved regarding the accurate value of the De Broglie wavelength.
Contextual Notes
Participants have not fully detailed their assumptions or the steps taken in their calculations, leading to uncertainty about the correctness of the values presented. There is also a lack of clarity on the definitions and parameters used in the calculations.