Social Worker Certificate Program Information. Social worker certificate programs, which may be offered at the bachelor's or graduate level, cover human behavior, social environments and laws, communication techniques, social welfare policy and more.
Explanation of Color From a Prism. Although no one knows who invented the prism, Sir Isaac Newton was the one who discovered that the rainbows they produced were merely the components of white light that had been separated. Usually just called light or âvisible light,â white light comes from the sun.
Image caption The company's founder invented the snow globe in Vienna at the very start of the 20th Century He was inspired by the shoemakers of the time, who to get more light from a candle mounted a glass globe filled with water in front of the flame. This gave them a light spot the size of a hand.