Quasi-stable electromagnetic teb
Thaum qhov zaus ntawm qhov hloov pauv tam sim no qis qis, nyob ze ntawm qhov tam sim no, lub electromagnetic nthwv dej ntawm qhov kev ncua deb ntawm qhov zaus no tsawg dua qhov wavelength ntawm electromagnetic yoj nyob rau hauv lub nqus tsev vacuum, thiab qhov ncua sij hawm ntawm electromagnetic teb yuav tsis quav ntsej. Electromagnetic teb nyob rau hauv xws li ib cheeb tsam yog quasi -stable. Teb los yog quasi - teb tsis tu ncua.