You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser.
-
L
They won't hit at the same time on Earth due to Earth's atmosphere.
On the Moon, where there's a vacuum, they WILL hit at the same time.
-
L
Yes, that's absolutely true.
Generally, for a thin (dilue) gas, it emits light at the same exact points that it absorps it.
