/sci/ - Science & Math

>>12542670
Unfold giant mylar mirror.
Mylar is about 25% more dense than water so you can get about 75 cubic metres of it into a Starship. If it's 0.1 mm thin you can get a sheet 750,000 square metres.
Make a parabolic mirror and concentrate that sunlight into a single square metre on the surface. Mylar has about 90% reflectivity so in that one square metre the sunlight is about 675,000 times as bright.
I'm pretty sure that's enough to instantly ignite anything it touches. Park it at the L2 Lagrange point and let the Earth spin underneath it and burn a scar across the surface constantly. Launch 100 of them and end human civilization in a week.