เครื่องขึ้นรูปกระดาษทิชชูรูปพระจันทร์เสี้ยว Lasers are characterised As outlined by their wavelength inside a vacuum. Most "single wavelength" lasers make radiation in quite a few modes with marginally various wavelengths. Although temporal coherence implies some diploma of monochromaticity, some lasers emit a broad spectrum of sunshine or emit different wavelengths of light at https://ruhollaht641gkn2.wikidank.com/user