Bandwidth of space!!! Can anyone tell me what might be the bandwidth of a m3 of space or air. As we can tell the b/w of Cu wire is in MBps , ethernet cables in GBps and that of optical fibre is around TBps ; is there any way to find out or any formula to calculate the threshold capacity of the space or wireless medium for holding various data in EM-waves of various frequencies. We all know that in a single room we can tune into 100s of short waves, AMs, FMs using a radio. In the same room we may use mobiles of different operators . Similarly in a same place we may use satellite disk to capture numerous TV stations and many more communication devices. So it means that the same room physically contains em-waves in thousands of number- we can separate them or tune into them using different electronic devices. I am thus wondering if space has some limit to hold EM-waves. EM waves has always amazed me a lot and I still do not understand how do they actually propagate. I have heard for many times that the b/w of space is near to infinite and as we see, it is so. But some us may still think that there must be some critical point or wave threshold of the space after which it breaks down. I am looking forward to having your opinions.