Why Does My Electron Energy Calculation Keep Failing?

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SUMMARY

The discussion centers on calculating the wavelength of an electron with a kinetic energy of 2.00 eV. The incorrect application of the formula E=h(c/n) was identified as the source of error. Participants emphasized the necessity of using the correct value for Planck's constant, specifically 4.14 x 10-15 eVs, when working with energy in electronvolts (eV). This correction is crucial for obtaining accurate results in energy-wavelength calculations.

PREREQUISITES
  • Understanding of kinetic energy in the context of quantum mechanics
  • Familiarity with Planck's constant and its units
  • Basic knowledge of the relationship between energy and wavelength
  • Proficiency in using scientific notation for calculations
NEXT STEPS
  • Review the derivation of the energy-wavelength relationship in quantum mechanics
  • Learn about the implications of using different units for physical constants
  • Explore the concept of electron energy levels in atoms
  • Investigate common errors in quantum calculations and how to avoid them
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Students and professionals in physics, particularly those focusing on quantum mechanics and energy calculations, will benefit from this discussion.

brandon26
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The kinetic energy of an electron is 2.00 eV. Find the wavelength.

I used E=h(c/n) where n=wavelength.
But the answer comes out wrong, please help.
 
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did you use the correct value for Plank's constant (h)? Since you have energy in units of eV, you should use 4.14 x 10^-15 eVs.
 

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