Questions with the keyword 'light'

• Is it possible to have a negative mass making it possible to travel faster than the speed of light? by alphacentauri2 to Simon . Comments: (No comments so far)
• …space ship fast enough to orbit a black hole, would you accelerate to a speed faster than light by tannedtuna and 2 others. to Simon, Heather, James, Mark, Matthew . Comments: (No comments so far)