solar power

Hi. What if we build hundreds of large solar reflectors that can then focus sunlight on a solar sail space craft. How many square miles of sun reflectors would be needed to accelerate a spacecraft at 1 g, on lets say 100 tons to 90% of the speed of light in lets say 3 years ? Regards from...

Hello, This is probably a very dumb question, however, i was wondering if an electric air compressor would work in space and if so would it be an effiecient way to propel a rocket (connecting it to solar panels) so it has somewhat a self sustainable propulsion method? Or if there is similar...