The electromagnetic spectrum is a map of all the types of light that we can identify. It separates all the types of light by wavelength because that directly relates to how energetic the wave is. More energetic waves have shorter wavelengths while less energetic waves have longer wavelengths.ot all light is in the visible spectrum, which is the light you can see. There are many kinds of electromagnetic waves that you can't see. Just look at the spectrum below. When we talk about a light detector, we are referring to any instrument that detects electromagnetic radiation.
By about age 12 or 13, most kids have lost all of their baby teeth and have a full set of permanent teeth. There are 32 permanent teeth in all â 12 more than the original set of baby teeth. Most people have four teeth (called wisdom teeth) grow in at the back of the mouth when they're between 17 and 25 years old.
Read more about baby teeth and how to tell if a baby is teething. By the age of 12 to 14, most children have lost all their baby teeth and have their adult teeth. There are 32 adult teeth in total â 12 more than in the baby set. The last four of these, called wisdom teeth, usually emerge later than the others, generally between the ages of 17 and 21.