A blue laser emits light with a wavelength of 432nm. What is the frequency of th

Question

A blue laser emits light with a wavelength of 432nm. What is the frequency of the light? The laser had an average emitted power of 5 mW. If the beam is 1.1mm^2, what are the average intensity, the rms electric field strength and the rms magnetic field strength? A blue laser emits light with a wavelength of 432nm. What is the frequency of the light? The laser had an average emitted power of 5 mW. If the beam is 1.1mm^2, what are the average intensity, the rms electric field strength and the rms magnetic field strength?

Explanation / Answer

velocity (c) = frequency x wavelength

there fore frequency = 3x 10^8 m/s /432 nm

= 6.94 x 10^14 hertz

Power = 5mW ,

Intensity = Power/ area

= 5 mW/ 1.1 mm2

= 4.555 mW/mm2

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