advice for high power burning class 4 laser

Marco Polo said:

Assuming equal reflectance for all visible wavelengths, it comes down to a) beam power, and b) the eye's response to the wavelength in question.

If green, your pupil will constrict, blocking out most of the light.

If violet, your pupil will probably not constrict, because it's not a very visible wavelength. That will allow much more of the light to enter the eyes.

That would make dimmer wavelengths more "dangerous."

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