i was watching the movie apollo 13 when i came upon a couple questions that didnt make sence to me. it involved communications from the astronauts and
the space station on earth.
1.how do astronauts communicate with earth?
a. a satellite from earth sends radio signals to the space craft on the moon.
2.how far is the moon?
a.
The distance between the Moon and the Earth varies from around 356,400 km to 406,700 km at the extreme perigees (closest) and apogees (farthest). On
19 March 2011, it was closer to the Earth while at full phase than it has been since 1993.[93] Reported as a "super moon", this closest point
coincides within an hour of a full moon, and it thus appeared 30 percent brighter, and 14 percent larger than when at its greatest
distance.[94][95][96]
wiki link
3.if certian radio waves can travel at the speed of light, how fast is light?
a.
The speed of light in vacuum, usually denoted by c, is a universal physical constant important in many areas of physics. Its value is 299,792,458
metres per second, a figure that is exact since the length of the metre is defined from this constant and the international standard for time.[1] In
imperial units this speed is approximately 186,282 miles per second.
Exact values - Metres per second 299,792,458 Planck units 1
Approximate values - kilometres per second 300,000 kilometres per hour 1,080 million
miles per second 186,000 miles per hour 671 million
astronomical units per day 173
wiki link
NASA link
so if the earth is (lets go with the shorter side to favor the skeptics) 350,000 km from earth. and the fastest signal travels at 300,000 km/s (pic
in link has conversions for speed), it should take 2 seconds delay if not a bit more.
i know 2 seconds is not alot but in a conversation that distance, i dont see a delay longer than someone talking to someone else on the other side of
the world.
i guess my question is how are we sending information to the moon faster than the speed of light?
edit on 8-4-2012 by m.red because: (no reason given)
edit on 8-4-2012 by m.red because: (no reason given)
edit
on 8-4-2012 by m.red because: (no reason given)
edit on 8-4-2012 by m.red because: (no reason given)
edit on 8-4-2012
by m.red because: (no reason given)