askpari ♦ November 23, 2012 ♦ 11 Comments
The first guns were cannons. They were first used in warfare some time in the first half of the 14th century. The big guns that are now known as artillery were once called cannons. “Cannon” comes from an old Latin word meaning “tube” or “reed.” The cannon first appeared in Europe during the 1300s, after …
askpari ♦ October 30, 2012 ♦ Leave a comment
Camera film is coated with special chemical sensitive to light. A camera is basically a box which light cannot enter, except through a small hole located at one end of the camera. This opening is covered with a glass lens. A shutter opens and closes the hole behind the lens. When we open and close …
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