Invention and Invention and InventorInventor

Done by Bernice, Done by Bernice, Asmara, Danish and Asmara, Danish and

JonathanJonathan

Who invented X-Ray Who invented X-Ray machine?machine?• In November of 1895, In November of 1895,

Wilhelm Rontgen, a Wilhelm Rontgen, a physics professor physics professor from Germany, from Germany, discovered X-Rays discovered X-Rays while examining while examining Crookes tubes, which Crookes tubes, which are gas-filled are gas-filled discharge tubes used discharge tubes used to study electrons .to study electrons .

How Did he discovered X-Ray How Did he discovered X-Ray machine?machine?

• In a serendipitous occurrence, after wrapping In a serendipitous occurrence, after wrapping one of his tubes in thin, black cardboard, he one of his tubes in thin, black cardboard, he noticed that some light managed to pass noticed that some light managed to pass through, glowing on the wall of his laboratory. through, glowing on the wall of his laboratory. Upon further investigation, he found that the Upon further investigation, he found that the rays could also pass through paper, books, rays could also pass through paper, books, and then, momentously, his wife's hand. The and then, momentously, his wife's hand. The resulting photograph of his wife's hand bones, resulting photograph of his wife's hand bones, complete with a ring, is credited as being the complete with a ring, is credited as being the first ever X-Ray image of a human body part. first ever X-Ray image of a human body part.

How is X-Ray used?How is X-Ray used?• By the early 1920s, it was realized that using By the early 1920s, it was realized that using

Crookes tubes were undependable. In order to Crookes tubes were undependable. In order to generate a current, the tubes must be partially generate a current, the tubes must be partially filled with gas, which would inevitably be absorbed filled with gas, which would inevitably be absorbed by the glass and eventually lead to the inoperability by the glass and eventually lead to the inoperability of the X-Ray. This was inefficient, meaning that new of the X-Ray. This was inefficient, meaning that new Crookes tubes had to be produced each time one Crookes tubes had to be produced each time one burnt out. Think of it like having to replace a very burnt out. Think of it like having to replace a very expensive light bulb far more often than you would expensive light bulb far more often than you would like. This unfortunate fact led to the adoption of like. This unfortunate fact led to the adoption of Coolidge tubes, which used a filament made of Coolidge tubes, which used a filament made of tungsten and was invariably heated via an tungsten and was invariably heated via an electrical current. electrical current. 

Birth and Death of RoentgenBirth and Death of Roentgen

Wilhelm Conrad Roentgen Born at: Thursday March 27 1845Died at: Saturday February 10 1923 Age 77

Thank You For Listening!!!Thank You For Listening!!!