4 ms·
True, but over 2+ miles? Laser level would work, if the laser was powerful enough.
by irrational 4y ago
True, but over 2+ miles? Laser level would work, if the laser was powerful enough.
- jojobas 4y agoSomething like this should do. https://www.istecnik.com.au/digipas-precision-digital-levels/dwl3000xy-dwl3500xy-dual-axis-precision-levels/ https://www.istecnik.com.au/digipas-precision-digital-levels...
- HPsquared 4y agoA long water hose.
- sebzim4500 4y agoGiven they explain the horizon using refraction, the same explanation should 'work' here.