Radiation from the sun caused this sunburned back The most common kind of radiation is sunlight, and the most common cause of injury from radiation is a sunburn. Just like radioactivity from a [...]
Photons - Sunshine breaking through the clouds. When did the first photons appear? A photon is a tiny little particle of light, far too small to see individually. All light is [...]
Rainbow over Amazon river - What is light made of? What is light made of? Light is made of billions of tiny particles called photons. These photons travel from one place [...]
