A Solid State Pulsed Laser Has an Energy of 400

question 15

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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