If you like us, please share us on social media or tell your professor. Consider building or adopting a Wikitext for your course like Prof. Dianne Bennett from Sacramento City College demonstrates in this video.
When things are small, very light, or both, then the classical perspective or paradigm we know and love breaks down and funky unexpected results occur. This is the quantum world where the rules of the universe are significantly different from conventional rules we use in everyday life. For example, in this world nothing ever stops moving, people can exist at two spots simultaneously (just as long as you don't look too closely) and everyone has a specific wavelength.