J Joanna New member Jun 10, 2009 #1 Radio waves travel at the speed of light. If we sent a message to Alpha Centauri, how long would we have to wait before receiving a reply?
Radio waves travel at the speed of light. If we sent a message to Alpha Centauri, how long would we have to wait before receiving a reply?
M Mustang Gal Guest Jun 10, 2009 #2 We wouldnt get a radio wave back because it is in the main sequence stage so then we wouldnt get a message back
We wouldnt get a radio wave back because it is in the main sequence stage so then we wouldnt get a message back
R Robert k New member Jun 10, 2009 #3 hmmmm.......I don't really want to just give an answer to something that sounds like a homework question. How about a hint? If you can find out how far away Alpha Centauri is, then the answer should come to you with just a little bit of thought.
hmmmm.......I don't really want to just give an answer to something that sounds like a homework question. How about a hint? If you can find out how far away Alpha Centauri is, then the answer should come to you with just a little bit of thought.
R Rudolph D New member Jun 10, 2009 #4 distance to alpha centauri is about 4.3 ly. one way message = 4.3 years. if they replied in a relatively short time... 4.3 more years.
distance to alpha centauri is about 4.3 ly. one way message = 4.3 years. if they replied in a relatively short time... 4.3 more years.
