Albert Einstein advanced Planck's theory in 1905 when he studied the photoelectric effect. First, he began by shining ultraviolet light on the surface of a metal. When he did this, he was able to detect electrons being emitted from the surface. This was Einstein's explanation: If the energy...
This theory is easy to spot; one only need glance at the local grocery store's magazine rack and view which tabloids feature the latest celebrities to go under the knife. Many people with BDD aren't even seeking to look as glamorous as those celebrities; they just want to resemble what ...
In the late 1890s, Sigmund Freud, the founder of psychoanalysis, published his famous work,The Interpretation of Dreams, which connected certain objects or dream events with specific meanings. (8) (10) Since then, researchers have kept studying dreams and what they mean, finding better and more...
This X-ray is of the hands of Queen Mary and King George and was taken just a year after the monumental and accidental discovery of X-rays in 1895. Science & Society Picture Library/SSPL via Getty Images As with many of mankind's monumental discoveries, X-ray technology was invented ...