Recent content by deathtical

Wouldn't that only apply if you sent it to yourself? If you are sending such a signal to a point that is far away from you (let's just say a light year) then this would just mean that the message would arrive faster than if you sent a radio signal... right?

Good catch. I should have said the density of the medium affects the speed and distance that sound travels. Hmm... that doesn't look right either. I defiantly know it affects how far it travels. A sound in water can be heard half way around the world (providing it is in the right propagation...

Hmm... those photons are odd little things. So if what everyone has said is correct, then a solar sail could be potentially driven/powered by light, radio waves, Xrays, microwaves, and gamma rays since they are all photons.? Actually, let me just try and clarify something... every time I have...

How do they transfer that momentum if there is no mass to cause friction?

OK. Yeah, I remember reading that photons had no mass. Hmm... if photons have no mass then how do solar sails work? Wouldn't there need to be something physical pushing on them to make them move? My understanding was that light was "collected" by the sails and that pushed the sail away from the...

Yeah, meant to say Mars not the moon. :wink: Other thought... I thought nothing could travel at the speed of light. But radio waves do?

Ah, ok. I thought the sound example might hold more weight since light does produce a "sound". We cannot hear it without assistance from a machine/computer but it does produce one. Actually, anything that "vibrates" (ie: has a wave length) produces a sound. I just depends on whether you have the...

I know that for the longest time we have been listening to radio waves for some sign of life. I also recently heard that SETI was shut down do to lack of funds recently :cry:. I was just wondering, if there is another intelligent space faring race out there that was capable of extra-solar travel...

I was just wondering because as I understand it, there are different wave lengths of light. Also, if I understand it correctly, "light" is both a wave and a particle (photon). Now, I was a SONAR specialist in the Navy and one of the things we had to learn there was that sound waves...

Oh no. Science Channel has done it again. They just had a great show called "What Happened Before the Big Bang?". Very interesting and informative. Not only did many genuine scientists describe the BB using the "e" word :devil: but they discussed several very interesting new ideas about...

I understand. Thanks.

I was watching something on the Science Channel and a Cosmologist was trying to break it down for everyone watching. Her explanation started with that and got increasingly more specific from there. By the time she had finished her explanation it was evident that she was trying to convey that it...

Thank you. This is much more useful.

WOW! You people keep bringing this up. When I already explained that YES I have heard scientists describing the Big Bang as being like an explosion. It was in reference to the way all matter in the universe was spread out from a central point. Some scientist do come off their high horses and try...

:approve: