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.
Place your electric collar and a leash on your dog and walk to the boundary. Once you get to where the warning begins, turn around immediately and head to the center of the yard. When your dog follows you, praise it.Repeat this at different points around the boundary.lace your electric collar and a leash on your dog and walk to the boundary. Once you get to where the warning begins, turn around immediately and head to the center of the yard. When your dog follows you, praise it.