How to Calculate the Kinetic Energy of a Photon Using the de Broglie Hypothesis

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SUMMARY

The discussion focuses on calculating the kinetic energy of a photon using the de Broglie hypothesis, specifically when the de Broglie wavelength is comparable to the size of an atom (~10^-10 m). Participants emphasize the formula for photon energy, E = hf, which is commonly used in UK schools, contrasting it with E = hν. The confusion between symbols is noted, particularly the similarity between "ν" and velocity. Participants are encouraged to post similar questions in the Homework Section for better organization.

PREREQUISITES
  • Understanding of the de Broglie hypothesis
  • Familiarity with the Planck constant (h)
  • Knowledge of photon energy calculations
  • Basic concepts of atomic size and wavelength
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  • Research the de Broglie wavelength formula and its applications
  • Study the relationship between energy and frequency in photons
  • Explore the implications of photon energy in quantum mechanics
  • Learn about the differences between E = hf and E = hν in educational contexts
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Students studying physics, educators teaching quantum mechanics, and anyone interested in the properties of photons and atomic structures.

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some help with this past exam question would be appriciated...

"Calculate the value of the kinetic energy in eV at which the de Broglie wavelength of a photon is comparable with the size of an atom (~10^-10 m)"


Thanks...
 
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The energy of a photon is given by E = h \nu.
 
We use E = hf in most UK schools, Doc Al, not E = h \nu
(I don't know why we use different symbols for the same thing... it can cause confusion!)
 
Please,post future problems in the Homework Section of this forum.

Daniel.
 
I hate the second form of expressing the energy of a photon (E=hv). Because the "v" can't really be differed from the velocity, ... (the signs are almost the same).
 
Adrian Baker said:
We use E = hf in most UK schools, Doc Al, not E = h \nu
I'll have to keep that in mind. :smile:
 

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