3 ms·
Cool. How does the laser kill the weed without risking starting a fire that might damage the crops?
by noonespecial 8y ago
Cool. How does the laser kill the weed without risking starting a fire that might damage the crops?
- nkoren 8y agoNot the OP, but I'd just point out that all you should need to do is get the stem above the boiling point of water, which is well below the combustion point. What wavelength to use for that could be an interesting discussion. Makes me wonder whether you could use masers (microwave lasers) rather than optical lasers for a more efficient "heating the weed from the inside" effect.
- thruflo22 8y agoYup. There are peaks for energy transfer into water around 1 and 2 microns. So mid-IR.