translation.en: In a laser, what makes laser light so different from the light above my head here is that this light is incoherent -- many different colors and different frequencies, sort of like the way you clapped initially -- but if you were a laser, it would be rhythmic applause.
translation.zh: 我头顶的光线是杂乱的—— 有许多不同的颜色和频率， 有点像你们一开始时的鼓掌—— 但激光和这不同， 它是“有节奏”的“鼓掌。”