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.
Credit: liz west CC-BY-2.0. The early handheld visual aid was found in the ancient ruins then known as Nineveh, and it has no known inventor. Eyeglasses came into greater fashion around 1752 when James Ayscough invented eyeglasses with hinged earpieces and tinted lenses, much like modern sunglasses.