3 ms·
Two mirrors at 90 degrees to each other should do it. Do you mean for it to flip both horizontally and vertically though? That would be more difficult. I'm not
by whoopdedo 6y ago
Two mirrors at 90 degrees to each other should do it. Do you mean for it to flip both horizontally and vertically though? That would be more difficult. I'm not sure but maybe a type of prism.