Question

Lasers can be used to drill or cut material. One such lasergenerates a series of high-intensity pulses rather than acontinuous beam of light. Each pulse contains 460 mJ of energy andlasts 10 ns. The laser fires 10 such pulses per second.

Part A -
What is the peak power of the laser light? The peak power is thepower output during one of the 10 ns pulses.
Express your answer using two significant figures.
P_peak = __________W

Part B -
What is the average power output of the laser? The average power isthe total energy delivered per second.
Express your answer using two significant figures.
P_avg = _________W

Part C -
A lens focuses the laser beam to a 10 μm diameter circle on thetarget. During a pulse, what is the light intensity on thetarget?
Express your answer using two significant figures.
I_laser = _________W/m²

Part D -
The intensity of sunlight at the surface of the earth at midday isabout 1100 W/m² . What is the ratio of the laserintensity on the target to the intensity of the midday sun?
Express your answer using two significant figures.
I_laser/I_sun= _________