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A Solid State Pulsed Laser Has an Energy of 400

Question 45

Multiple Choice

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*10²⁵
B) 2 *10²¹
C) 3 *10¹⁸
D) 6 * 10³⁸
E) 2 * 10¹⁸

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