Electronics > Beginners

Can antennas emit light? Light vs electricity

<< < (3/3)

radiolistener:

--- Quote from: Mechatrommer on May 17, 2019, 02:06:02 pm ---the easiest is tip of antenna connected to + of light bulb, - to gnd, there goes your light emitting antenna.

--- End quote ---

Here is another example of light-emitting antenna   ^-^

golden_labels:

--- Quote from: radiolistener on May 17, 2019, 08:03:54 am ---Just try to pass through light through coax cable, you will see it almost don't works due to high loss :)
--- End quote ---
It’s just a matter of power. If it is high enough, it will pass and emit light in all directions. Along with some amounts of gases rich in carbon compounds. ;)

ejeffrey:
I seem to remember some research a while back that was using carbon nanotubes as optical frequency coaxial cables and antennas.  I don't remember any details of what they were trying to demonstrate (probably: nanotubes!) or how successful they were.  There is no reason it can't work, but it is really hard in practice due to all the reasons explained above. 

windsmurf:

--- Quote from: Mechatrommer on May 17, 2019, 02:06:02 pm ---the easiest is tip of antenna connected to + of light bulb, - to gnd, there goes your light emitting antenna.

--- End quote ---

Exactly what I was going to say... an incandescent light bulb IS a light emitting antenna.  The filament does the conversion and transmission. So is an LED.

Navigation

[0] Message Index

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod