Unusual breath odors are common in kids. Typically there isnât anything to worry about, but there are some breath odors that indicate an underlying problem. In children smelly breath that persists throughout the day is most often the result of mouth-breathing, which dries out the mouth and allows the bacteria to grow.
Light is composed of particles called photons, and matter is composed of particles called electrons, protons, neutrons. It's only when the mass of a particle gets small enough that its wavelike properties show up. To help understand all this let's look at how light behaves as a wave and as a particle.
Light is composed of electric and magnetic fields and thus its alternate name electromagnetic spectrum. Light can be absorbed and emitted by atoms and molecules. The precise details of which give us the world we see around us. Chemists are interested in the details of absorption and emission of light by matter because these details can be viewed as fingerprints of atoms and molecules as well as their chemical properties.