Lasers can even have large temporal coherence, which permits them to emit mild with an extremely slim frequency spectrum. Temporal coherence can also be employed to generate ultrashort pulses of sunshine which has a wide spectrum but durations as short as an attosecond.[7] ช่วยปรับสีผิวให้มีความสม่ำเสมอกันทั่วทั้งใบหน้า Quite a few lasers produce a https://fredq529beh0.wonderkingwiki.com/user