Calculate the energy and wavelength of the photon

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Homework Help Overview

The discussion revolves around a physics problem related to energy levels in atoms, specifically calculating the energy and wavelength of a photon emitted when an atom transitions from an excited state back to the ground state. The energy level is given as 1.8 eV above the ground state.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the relationship between the energy lost by the electron and the energy of the emitted photon, referencing the conversion of electron volts to joules. Questions arise regarding the appropriate numbers to use in calculations and whether further conversion is necessary.

Discussion Status

Some participants have provided guidance on the relationship between energy and wavelength, as well as the conversion factor for electron volts. However, there remains uncertainty about the specific values to be used in the calculations, indicating an ongoing exploration of the problem.

Contextual Notes

Participants are working within the constraints of a homework assignment, which may limit the information available for solving the problem. The original poster expresses difficulty in determining the next steps for the calculations.

shezill
this was a question in a prevoius year exam that I am really stuck on.

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

help me please
thank you
 
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Doesn't seem very difficult...

Energy of photon = energy lost by electron as it goes down the energy level.

Also, E = hf = h*c/l

Plug in the numbers...

And don't forget that 1 eV = 1.6 * 10^-19 J
 
Last edited:
but what numbers do i plug in. Do i have to use a fomula on the 1.8eV first to get the numbers or just use that.
 
Originally posted by shezill
but what numbers do i plug in. Do i have to use a fomula on the 1.8eV first to get the numbers or just use that.

1 eV = 1.6x10^-19 Joules

Convert it to Jays.
 
thank you very much
 

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