The photoelectric effect is one of the most fundamental light-matter interactions, which is widely used in probing ultrafast dynamics in atoms, molecules and condensed matters. It has been in the ...

Photoionization, the process by which an incident photon ejects an electron from an atom, lies at the heart of many atomic physics studies. Coupled with cross section measurements – which quantify the ...

Sponsored by PittconReviewed by Danielle Ellis, B.Sc.Feb 12 2026 The idea that light can behave as both a particle and a wave is one of the strange central concepts in quantum mechanics known as ...

What you’re looking at is the first direct observation of an atom’s electron orbital — an atom’s actual wave function! To capture the image, researchers utilized a new quantum microscope — an ...

The idea that light can behave as both a particle and a wave is one of the strange central concepts in quantum mechanics known as wave-particle duality. Towards the end of the 19 th century and the ...