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Why not use Xrays or high frequency waves for communication?????

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shirish heller

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why do we not use high frequency waves such as X rays , gamma rays etc. instead of radio waves for communication . coz their modulation is easy larger bandwidth,speed and shorter antenna?????
 

You can be the first guinea pig for the testing of an x-ray/gamma ray cell phone. I hope you like being bald. :)
 

:lol:

It's bad enough having a label on my DVD player telling me not to look into the laser. It doesn't explain how I'm supposed to fit my head into the disc drawer though. Perhaps they consider going blind is more dangerous than crushing your skull flat !

The X-ray smart phone seems like a novel idea, imagine holding it to your ear and the other person seeing inside your head, or even worse telling you they can see straight through.

Brian.
 

betwixt said:
It's bad enough having a label on my DVD player telling me not to look into the laser. It doesn't explain how I'm supposed to fit my head into the disc drawer though. Perhaps they consider going blind is more dangerous than crushing your skull flat !
Click to expand...

That's to keep the Darwin award candidate from hopefully trying their hardest to look at whatever it is that reads those DVDs. Of course as they are the top tier candidates for a Darwin award they will probably think that they can look at it if they use a mirror...after which they will fall into the full bath tub along with the plugged in DVD player that was sitting on the edge of the tub.
 
shirish heller said:
why do we not use high frequency waves such as X rays , gamma rays etc. instead of radio waves for communication . coz their modulation is easy larger bandwidth,speed and shorter antenna?????
Click to expand...

The idea is right - for some applications we use optical communication (µm wavelength) instead of microwaves (mm wavelength) for larger bandwidth. Xrays is another step towards small wavelength (nm wavelength). The difficulty might be suitable waveguides and modulators/demodulators.
 
I keep meaning to try to talk the HFT crowd into funding the physics to develop neutrino comms, new york to the far east via the **direct** path!

Of course the demodulator is somewhat problematic.

Regards, Dan.
 

betwixt said:
:lol:

It's bad enough having a label on my DVD player telling me not to look into the laser. It doesn't explain how I'm supposed to fit my head into the disc drawer though. Perhaps they consider going blind is more dangerous than crushing your skull flat !

The X-ray smart phone seems like a novel idea, imagine holding it to your ear and the other person seeing inside your head, or even worse telling you they can see straight through.

Brian.
Click to expand...
we could try using something other than X-ray with higher freq. but not dangerous...P.S can we generalize the statement that if the frequency is very high then the wave would certainly be dangerous(because of more energy in it)
 

Apart from the technical difficulties of dealing with controlled super high frequencies, and the danger of seeing inside my head (it's a dark, dark place!) you should consider why we use X-ray and gamma rays in existing applications. X-rays are used because they are easily blocked by dense objects, thats how they produce photographs to show our insides. Gamma rays are used to sterilize food stuffs because it destroys organic nucleii. Both are very good reasons not to use them. One would have a very short range, the other might kill you. When you quite correctly state that data rate is proportional to bandwidth and that is limited by frequency, you are missing the point that the Nyquist limit is basically two carrier cycles per sample so even at much lower frequencies the theoretical data speed is faster than we ever need.

Brian.
 
betwixt said:
Apart from the technical difficulties of dealing with controlled super high frequencies, and the danger of seeing inside my head (it's a dark, dark place!) you should consider why we use X-ray and gamma rays in existing applications. X-rays are used because they are easily blocked by dense objects, thats how they produce photographs to show our insides. Gamma rays are used to sterilize food stuffs because it destroys organic nucleii. Both are very good reasons not to use them. One would have a very short range, the other might kill you. When you quite correctly state that data rate is proportional to bandwidth and that is limited by frequency, you are missing the point that the Nyquist limit is basically two carrier cycles per sample so even at much lower frequencies the theoretical data speed is faster than we ever need.

Brian.
Click to expand...

thanks for your time , good explaination

- - - Updated - - -

betwixt said:
:lol:

It's bad enough having a label on my DVD player telling me not to look into the laser. It doesn't explain how I'm supposed to fit my head into the disc drawer though. Perhaps they consider going blind is more dangerous than crushing your skull flat !

The X-ray smart phone seems like a novel idea, imagine holding it to your ear and the other person seeing inside your head, or even worse telling you they can see straight through.

Brian.
Click to expand...

the other person cannot see through my head he'll have to have X ray vision for that...although it'll damage my brain cells...so touche
 

Modulation bandwidth may be theoretically high, but what
have you got for real ability to phase, frequency or amplitude-
modulate any X-ray emitter? The HV power supply, that's
not going to be agile. Neither is filament current.

Inefficiency of X-ray generation and the simple fact that
you'd need 10kV to 1MeV in your pocket, is not going to
be kind to your plan. Or for that matter your baby-making
equipment.
 
If you want to, you should invent suitable devices to send and receive the data, and to counter propagation problems well as possible health issues.
To use in space I guess someone is already working on it.
 

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