Question

5.) Lasers can be used to drill or cut material. One such laser generates a series of high intensity pulses rather than a continuous beam of light. Each pulse contains 1.00 Joules of energy and lasts 18 nanoseconds. The laser fires 15 such pulses per second. (a) Find the peak power of the laser. (b) Find the average power output of the laser. (c) A lens focuses a laser beam to a 15 μm diameter circle on the target. During a pulse, find the light intensity on the target. (d) The intensity of sunlight at miday is about 1100 W/m2. Find the ratio of the laser intensity on the target to the intensity of the midday sun.

Answer 1