Question: A LASIK vision-correction system uses a laser that emits 10 ns-long pulses of light, each with 2.5 mJ of energy. The laser beam is focused

A LASIK vision-correction system uses a laser that emits 10 ns-long pulses of light, each with 2.5 mJ of energy. The laser beam is focused to a 0.85-mm-diameter circle on the cornea.
What is the electric field amplitude of the light wave at the cornea?

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