Question

LASIK (Laser Assisted in Situ Keratomileusis) is now a common eye surgery in which a laser is used to remove a thin layer of cornea, correcting vision in the eye so glasses or contacts do not need to be worn. Typically, a laser known as an excimer laser is used, with a wavelength of 193 nm, which has been shown to produce high-quality incisions in the delicate tissue of the eye.

(a) In what section of the electromagnetic spectrum does a wavelength of 193 nm place this laser?

gamma

x-ray

ultraviolet

visible

infrared

microwave

radio wave

long wave

(b) If such a laser has a power of 9.00 mW, and is turned on for pulses lasting 16.0 ns each, how much energy is delivered by the laser to the eye in each pulse? J

Answer 1