Question: In laser eye surgery, the laser emits a 1.45- ns pulse focused on a spot that is 32.5 m in diameter. (a) If the energy

In laser eye surgery, the laser emits a 1.45- ns pulse focused on a spot that is 32.5 µm in diameter.

(a) If the energy contained in the pulse is 2.95 mJ, what is the power per square meter (the irradiance) associated with this beam?

(b) Suppose a molecule with a diameter of 0.500 nm is irradiated by the laser beam. How much energy does the molecule receive in one pulse from the laser? (The energy obtained in part (b) is more than enough to dissociate a molecule.)

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