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.
Nature of Light. Light is a wave, but the traveling disturbance is and electric and magnetic field, not a pressure variation like a sound wave. Sound has to travel through matter, but light does not have to travel through a medium. Therefore light can travel through a vacuum. Light waves also carry energy with them; that is how sunlight warms us up when we absorb it. In a vacuum, light travels with a speed of about 3Â´108 m/s, or 300,000,000m/s, i.e. very fast.