2 ms·
When you look at anything you are seeing what it looked like at least a few hundred picoseconds (very close to your face) to several nanoseconds (around the roo
by chongli 4y ago
When you look at anything you are seeing what it looked like at least a few hundred picoseconds (very close to your face) to several nanoseconds (around the room you’re in) in the past. The difference here is a matter of degree, not kind.
- bcbrown 4y agoLight travels a foot per nanosecond, more or less. I believe this can be a real constraint in IC/motherboard designs with gigahertz+ clock speeds.