How intense does light have to be to make a laser?

Lasers are very powerful beams of light. You can't just turn on a flashlight or lamp to make a laser. So how intense does the light have to be? We asked mechanical engineering professor Sayan Biswas to help us find the answer.

Lasers are very powerful beams of light. You can't just turn on a flashlight or lamp to make a laser. So how intense does the light have to be? We asked mechanical engineering professor Sayan Biswas to help us find the answer.
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Andrew Walsh | APM Podcasts

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How intense does light have to be to make a laser?

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