The visible spectrum is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye.Electromagnetic radiation in this range of wavelengths is called visible light or simply light.he visible spectrum is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye.
Potty-training success hinges on physical and emotional readiness, not a specific age. Many kids show interest in potty training by age 2, but others might not be ready until age 2 1/2 or even older â and there's no rush. If you start potty training too early, it might take longer to train your child.eady, set, go! When you decide it's time to begin potty training, set your child up for success. Start by maintaining a positive attitude â and recruiting all of your child's caregivers to do the same. Then follow these steps.
When children are about a year old, they can begin to recognize that they have a full rectum or bladder. Some are ready to start potty training as early as 18 months, while others aren't interested until after age 3. Many parents begin potty training when their children are about 2 1/2.