If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Electronic transitions


The diagram below depicts five molecular electronic energy levels, labeled E1 through E5. The arrows indicate four possible electronic transitions between these levels.
Based on the diagram, which of the four transitions is associated with photons of the shortest wavelength?
Choose 1 answer: