A laser generates a pulse at 450 nm containing 2.75 × 10^15 ​ ​​ photons. What is the energy of the pulse?


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Michael Poland Profile
Michael Poland answered

What shift of laser?

What matrix?

Maurice Korvo Profile
Maurice Korvo answered

As I recall, a photon has no mass, and energy equals  kilogram-meters squared per second squared. If the photon has no mass, then the energy must equal zero. 

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