Mr. and Mrs. Morrison were on a safari in Africa.
As they were walking through the jungle, a huge lion comes creeping out towards them, ready to pounce.
"Shoot!" Mrs. Morrison screamed to her husband. "Shoot!!"
"I can't!" he yelled back. "I'm all out of film!"
Camera obscuraIn 1544, a solar eclipse was viewed at Louvain, which was later depicted in the first published book illustration of the camera obscura in use. Dutch mathematician and astronomer Reinerus Gemma-Frisius viewed a solar eclipse using a hole in one wall of a pavillion to project the sun's image upside down onto the opposite wall. He published the first illustrationof a camera obscura, depicting his method of observation of the eclipse in De Radio Astronomica et Geometrica (1545). Several astronomers made use of such a device in the early part of the 16th century. Both Johannes Kepler and Christopher Scheiner used a camera obscura to study the activity of sunspots. The technique was known to Aristotle (Problems, ca 330 BC). |
