เครื่องขึ้นรูปกระดาษทิชชูรูปพระจันทร์เสี้ยว Lasers are characterized according to their wavelength in the vacuum. Most "one wavelength" lasers generate radiation in quite a few modes with a little diverse wavelengths. Although temporal coherence indicates some degree of monochromaticity, some lasers emit a wide spectrum of sunshine or emit various wavelengths of sunshine simultaneously. https://jacquesn418aeh0.blogpixi.com/profile