เหมาะกับผู้ที่ต้องการแก้ปัญหาหลุมสิว ให้หลุมสิวตื้นขึ้น Lasers are characterised In line with their wavelength inside a vacuum. Most "one wavelength" lasers make radiation in various modes with marginally distinctive wavelengths. Even though temporal coherence implies some degree of monochromaticity, some lasers emit a broad spectrum of sunshine or emit distinctive wavelengths of suns... https://franke085qux6.like-blogs.com/profile