Share to: It is our eyes that are capable of detecting a portion of the electromagnetic (EM) spectrum called visible light, or the optical spectrum.We describe the different frequencie â¦ s by color, with red being the lowest of the frequencies we can see.t is our eyes that are capable of detecting a portion of the electromagnetic (EM) spectrum called visible light, or the optical spectrum.
Young dogs can react unpredictably to electric dog fences, so understanding a puppy's development is essential to deciding when to start training the animal with the fence and collar. Generally, puppies should not be introduced to electric dog fences until they're at least four or five months old.
Electric dog fences usually come with 20-gauge (thinnest), 18-gauge, 16-gauge, or 14-gauge (thickest) wire. The 20-gauge wire with a vinyl coating is what you will find in most pre-packaged do-it-yourself fencing kits. Most professionally installed systems use the more substantial 14, 16 or 18 gauge wire. Whether youâre replacing a section of your existing fence or wiring your yard from scratch, you can easily find a relatively inexpensive and compatible wire for your project.