Calculate the power per unit area at the retina

Reference no: EM13343253

A laser used in eye surgery emits a 3.12 mJ pulse in 1.11 ns, focused to a spot 25.7 um in diameter on the retina.

A) Calculate (in SI units) the power per unit area at the retina. (This quantity is called the irradiance.)

B) What energy is delivered to an area of molecular size - say, a circular area 0.650 nm in diameter?

Reference no: EM13343253

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