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In laser eye surgery, the laser emits a 1.14-ns pulse focused on a spot that is...

In laser eye surgery, the laser emits a 1.14-ns pulse focused on a spot that is 31.5 μm in diameter.

A) If the energy contained in the pulse is 2.60 mJ, what is the power per square meter (the irradiance) associated with this beam? [I=__W/m2]

B) Suppose a molecule with a diameter of 0.400 nm is irradiated by the laser beam. How much energy does the molecule receive in one pulse from the laser? (The energy obtained in this part is more than enough to dissociate a molecule.) [Emol= __MeV]

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