Kurzgesagt has a neat new explainer: “How small is an atom?” I watched it. It does a great job at giving you an idea of how small atoms are and how they work. But it doesn’t matter, because my brain ...

photons in the laser beam must have exactly the same frequency. Kurzgesagt describes this as 'something like a' light choir 'with the same tone.' How are the photons that form the basis of lasers ...

(via Kurzgesagt) Atoms are very weird. Wrapping your head around exactly how weird, is close to impossible – how can you describe something that is SO removed from humans experience? But then again, ...