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.
There is much disagreement as to who made the first microscope. Some point to Dutch spectacle-makers Zacharias and Hans Janssen in the early 17th century, who made an adjustable tube with two lenses, one biconvex and one planar convex.