Calc. Spread Wavelength w/ Monochromatic Light Source

[truth_hunter]

Hello,
here is a poser for you how do you calculate the spread in wavelngth when a monochromatic light source of known wavlength is chopped by a shutter into a known pulse duration?

 

[ZapperZ]

Hello,
here is a poser for you how do you calculate the spread in wavelngth when a monochromatic light source of known wavlength is chopped by a shutter into a known pulse duration?

Take the signal in the time domain and do a Fourier transform into the frequency domain. You'll obtain all the harmonics of that signal.

Zz.

 

[sir-pinski]

To calculate the spread in wavelength, we can use the formula: Δλ = cΔt/λ, where Δλ is the spread in wavelength, c is the speed of light, Δt is the pulse duration, and λ is the known wavelength of the monochromatic light source.

For example, if we have a monochromatic light source with a wavelength of 500 nm and we chop it into a pulse duration of 10 milliseconds, the spread in wavelength would be Δλ = (3 x 10^8 m/s)(10 x 10^-3 s)/(500 x 10^-9 m) = 6 x 10^-3 m = 6 nm.

This formula assumes that the pulse duration is much shorter than the wavelength of the light source, and that the light source is truly monochromatic. Any deviations from these assumptions may result in a slightly different calculation.

I hope this helps with your question. Let me know if you have any further queries.