You forgot about one very important element of the fiber optic cable - the hydrophobic gel filler. The glass used, oddly enough, is very easily destroyed by water. The fibers are bathed in gel so that water cannot approach them. By the way, an ordinary laser pointer is visible at a distance of more than 2 km in optical fiber. I conducted such an experiment. :)
We have similar effect with the sound here. My grandfather used to say that when we hear the train from the next valley behind the small hills, the weather is going to change. It happens only a few times in the year, otherwise you don't hear the train at all. And it's not the wind, or not only. When that happens we have 'thermic inversion', in the hills is warmer than in the valley, it's common in the mediterranean in winter. But usually after that it gets colder.
I would add one last quick slide on MPO/MTP ribbon connectors as those are common on IT servers and resonates with the cavalcade of fiber optic cable types.
Thanks for asking. Here is the link to the playlist for the optoelectronics series: th-cam.com/play/PLNm1_xEfhzSC-yCjpAM3T_eX2ee4H92UX.html Here is the link to other playlists for the electronics technology class: www.youtube.com/@Vocademy-Electronics-Tech/playlists
Bob I have a few question: 1) someone told me if a power line goes down, it can transmit current thru the ground and electricute someone nearby: but how is that possible if to flow thru ground it needs a path back to source, and the only way is if it has a ground rod going to transformer and if that’s the case, we are safe anyway cuz the electricity will be shut off in a picosecond. So why is this person telling me that we can get shocked if a power line falls down to ground? No path back to source = no current and if path to source = done on purpose and shuts off. 2) Why does Neutral to ground have zero volts at bonding main panel but a few N-G volts at a receptacle? 3) If a home isn’t grounded, then if we touch the outlet hot wire or energized metal of the receptacle, is it true we won’t get shocked because we need a connection back to source and since the home isn’t grounded, we have no way of having electricity flow thru us into ground and then into the neutral back to the transformer? And if that’s true that we can’t get shocked - then why ground homes? 4) If a home is grounded, and a breaker fails that’s supposed to shut off after the loop is completed, then we have an energized receptacle and when we touch it, we still have a grounded home system so we get shocked as electricity goes thru us into ground into neutral and back to transformer and back again!! Right? So isn’t grounding a home potentially more dangerous?
👍🏻👍🏻👍🏻😉thanks for sharing your expertise.
You forgot about one very important element of the fiber optic cable - the hydrophobic gel filler. The glass used, oddly enough, is very easily destroyed by water. The fibers are bathed in gel so that water cannot approach them.
By the way, an ordinary laser pointer is visible at a distance of more than 2 km in optical fiber. I conducted such an experiment. :)
We have similar effect with the sound here. My grandfather used to say that when we hear the train from the next valley behind the small hills, the weather is going to change. It happens only a few times in the year, otherwise you don't hear the train at all. And it's not the wind, or not only. When that happens we have 'thermic inversion', in the hills is warmer than in the valley, it's common in the mediterranean in winter. But usually after that it gets colder.
thanks a lot.
I would add one last quick slide on MPO/MTP ribbon connectors as those are common on IT servers and resonates with the cavalcade of fiber optic cable types.
How do I watch these videos in order? I want to watch all of them.
Thanks for asking. Here is the link to the playlist for the optoelectronics series:
th-cam.com/play/PLNm1_xEfhzSC-yCjpAM3T_eX2ee4H92UX.html
Here is the link to other playlists for the electronics technology class:
www.youtube.com/@Vocademy-Electronics-Tech/playlists
Bob I have a few question:
1)
someone told me if a power line goes down, it can transmit current thru the ground and electricute someone nearby: but how is that possible if to flow thru ground it needs a path back to source, and the only way is if it has a ground rod going to transformer and if that’s the case, we are safe anyway cuz the electricity will be shut off in a picosecond. So why is this person telling me that we can get shocked if a power line falls down to ground? No path back to source = no current and if path to source = done on purpose and shuts off.
2)
Why does Neutral to ground have zero volts at bonding main panel but a few N-G volts at a receptacle?
3)
If a home isn’t grounded, then if we touch the outlet hot wire or energized metal of the receptacle, is it true we won’t get shocked because we need a connection back to source and since the home isn’t grounded, we have no way of having electricity flow thru us into ground and then into the neutral back to the transformer? And if that’s true that we can’t get shocked - then why ground homes?
4)
If a home is grounded, and a breaker fails that’s supposed to shut off after the loop is completed, then we have an energized receptacle and when we touch it, we still have a grounded home system so we get shocked as electricity goes thru us into ground into neutral and back to transformer and back again!! Right? So isn’t grounding a home potentially more dangerous?
Heah, connectors have max 3dB Decay. I would not abuse on that.