One line in the helium spectrum is bright yellow and has the...

Name: Problem 42, Chapter 27: Physics
Uploaded: 2020-05-21T18:23:14-08:00
Duration: 1 min 17 s
Channel: Guilherme Barros
Description: One line in the helium spectrum is bright yellow and has the wavelength 587.6 nm . What is the difference in energy (in electron-volts) between two helium levels that produce this line?

One line in the helium spectrum is bright yellow and has the wavelength $587.6 \mathrm{nm} .$ What is the difference in energy (in electron-volts) between two helium levels that produce this line?

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Key Concepts

Energy Unit Conversion

Energy in physics is often expressed in joules, but for atomic and particle physics, electron-volts (eV) are more convenient. This concept covers converting energy from joules to electron-volts using the conversion factor 1 eV = 1.602×10?¹? joules, which is essential when interpreting photon energies in atomic spectra.

Photon Energy Calculation

This concept involves determining the energy of a photon using the relationship E = hc/?, where h is Planck’s constant, c is the speed of light, and ? is the wavelength of the photon. It links the observable wavelength of emitted or absorbed light to the energy difference involved in atomic transitions.

Atomic Energy Transitions

Atomic energy transitions refer to the process where electrons in an atom move between quantized energy levels. The difference in energy between these levels determines the energy of the photon emitted or absorbed during the transition, which in turn corresponds to specific wavelengths in the atom's spectrum.

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