Question

An industrial laser is used to burn a hole through a piece of metal. The average intensity of the light is

S= 4.72×10⁹W/m². What is the rms value of the electric field.

Answer 1

The rms value of the electric field is 19333 V/m.

Step-by-step explanation:

The rms value of the electric field can be calculated using the equation Erms = sqrt(I/Z0), where I is the intensity of the light and Z0 is the impedance of free space. The impedance of free space is approximately 376.73 ohms. Plugging in the values, we get Erms = sqrt(4.72x109 / 376.73) = 19333 V/m.