A solid state pulsed laser has an energy of 400 mJ per pulse. If its wavelength is 1.06 × 10^-6 m, how many photons are in each pulse?
a. 2 × 10^25
b. 2 × 10^21
c. 3 × 10^18
d. 6 × 10^38
e. 2 × 10^18
E
Physics & Space Science
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