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.
An electric fence can be either battery or mains powered, using an energiser unit which converts the power into high voltage pulses. If the wire carrying the pulse is touched by an animal, the current passes through the animal to the ground, and this effect gives a shock.n electric fence can be either battery or mains powered, using an energiser unit which converts the power into high voltage pulses. If the wire carrying the pulse is touched by an animal, the current passes through the animal to the ground, and this effect gives a shock.