Calculate the energy and wavelength of the photon.

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Discussion Overview

The discussion revolves around calculating the energy and wavelength of a photon emitted by an atom transitioning from an excited state to the ground state, specifically when the energy level is 1.8 eV above the ground state. The scope includes conceptual understanding and mathematical reasoning related to photon energy and historical context regarding the development of the photon concept.

Discussion Character

  • Homework-related, Conceptual clarification, Debate/contested, Historical

Main Points Raised

  • One participant requests help with calculating the energy and wavelength of a photon emitted from an excited atom.
  • Another participant suggests that providing a direct answer would not be beneficial for learning and hints at the importance of understanding how the energy level was determined.
  • A participant references Planck's equation, stating that the energy of a photon is related to its frequency through E = hf, where h is Planck's constant.
  • There is a debate among participants regarding the historical contributions of Planck and Einstein to the concept of photons, with some asserting that Planck introduced the constant while others argue that Einstein's work on the photoelectric effect established the photon concept.
  • One participant emphasizes that Einstein's Nobel Prize was awarded for his work related to photons, indicating the significance of his contributions in this area.

Areas of Agreement / Disagreement

Participants express differing views on the historical development of the photon concept, with no consensus reached regarding the contributions of Planck and Einstein. The initial request for help remains unresolved as participants engage in a broader discussion.

Contextual Notes

The discussion includes assumptions about the understanding of energy levels and the historical context of scientific contributions, which may not be fully articulated by all participants.

shezill
An atom has an energy level 1.8 eV above ground state. When excited, it returns to the ground state and emits a photn. Ccalculate the energy and wavelength of the photon.

help me please
thank you
 
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Well if you ask like this, I think it's like in Homework Help: You would learn nothing from a direct answer.
So here's a hint: How, do you think, has it been found out that the energy level is actually 1.8 eV? :wink:
 
Planck said that the energy of a photon is directly related to the frequency of the photon. We can express that as E = hf where h means Planck's constant.
 
Last edited:
ShawnD, Einstein said that
 
No, Planck said it. That's why they call it "Planck's constant"
 
Nope, it was Einstein who came up with the whole "photon" thing in his paper on the photo-eletric effect, which got him the Nobel Price.

For many years, Planck simply didn't buy the idea
 
Originally posted by Dimitri Terryn
Nope, it was Einstein who came up with the whole "photon" thing in his paper on the photo-eletric effect, which got him the Nobel Price.

Ding, ding, ding! That's what Einstein won the Noble Prize for.
 

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