มีประสิทธิภาพการแปลงค่าพลังงานที่ดี Lasers are characterised according to their wavelength in the vacuum. Most "one wavelength" lasers deliver radiation in many modes with a little bit different wavelengths. Despite the fact that temporal coherence indicates some degree of monochromaticity, some lasers emit a wide spectrum of sunshine or emit different wavelengths of https://hafize085qtv5.blogtov.com/profile