What is the shortest wavelength photon emitted in a hydrogen atom?

  • Thread starter Thread starter Kennedy111
  • Start date Start date
  • Tags Tags
    Photon Wavelength
Click For Summary
SUMMARY

The shortest wavelength photon emitted in a hydrogen atom corresponds to the transition of an electron from the n=2 energy level to the n=1 energy level, resulting in an energy change of 10.2 eV. The formula used to calculate the wavelength is λ = hc/E, where h is Planck's constant (4.14 x 10^-15 eV*s) and c is the speed of light (3.00 x 10^8 m/s). The correct calculation yields a wavelength of approximately 9.73 x 10^-8 m. The initial misunderstanding involved using -13.6 eV instead of the positive energy change associated with the transition.

PREREQUISITES
  • Understanding of quantum mechanics and energy levels in atoms
  • Familiarity with the hydrogen atom's energy levels
  • Knowledge of Planck's constant and the speed of light
  • Ability to manipulate equations involving energy and wavelength
NEXT STEPS
  • Study the hydrogen spectral series and its implications for photon emission
  • Learn about energy transitions in other elements and their spectral lines
  • Explore the concept of photon energy and its relationship to wavelength
  • Investigate the role of quantum mechanics in atomic structure and electron transitions
USEFUL FOR

Students studying quantum mechanics, physics educators, and anyone interested in atomic theory and photon behavior in hydrogen atoms.

Kennedy111
Messages
27
Reaction score
0

Homework Statement


Calculate the shortest wavelength photon that is emitted in the hydrogen atom.

Energy when n = 1 = -13.6 eV

Homework Equations



E = hc/λ
λ = hc/E

The Attempt at a Solution


Well as far as I understand, when the electron is in the n = 1 energy level it has it's lowest energy, which is -13.6 eV. I believe this is where the shortest wavelength will be...
λ = hc/E
= (4.14 x 10^-15 eV*s)(3.00 x 10^8 m/s) / -13.6 eV
= approx 9.13 x 10^-8 m

Was my method correct? I would really just like a second opinion. Thank you!
 
Physics news on Phys.org
The method is correct, but the photon energy is positive: 13.6 eV, the same the electron loses when it becomes bounded to the hydrogen atom. You divided by -13.6 eV, then ignored the sign, which is wrong.

ehild
 
Are n't photons produced when an electron jumps between energy levels not stay on one level? The shortest wavelength photon will be the one with least energy produced by an electron transition of the smallest energy. If the electron is to end up at n=1, the shortest wavelength photon comes from a jump from n=2 to n=1 (-3.4eV to -13.6eV).
 
Sorry I have just realized my mistake. Shortest wavelength comes from the largest energy not the smallest.
 

Similar threads

  • · Replies 26 ·
Replies
26
Views
2K
  • · Replies 1 ·
Replies
1
Views
5K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 48 ·
2
Replies
48
Views
4K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
4
Views
2K
Replies
1
Views
3K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 11 ·
Replies
11
Views
3K
Replies
2
Views
2K