WHAT DOES เลเซอร์ MEAN?

Lasers can even have substantial temporal coherence, which permits them to emit gentle with a really narrow frequency spectrum. Temporal coherence can also be used to generate ultrashort pulses of light that has a wide spectrum but durations as limited as an attosecond.[seven]ไม่ต้องพักฟื้นนาน: การทำเ�