History of Physics: Part — II

History of Physics: Task - II

You will watch a video film about an accidental discovery of x-rays by Wilhelm Roentgen.
As you watch complete the sentences 7-13.
Use NO MORE THAN THREE WORDS for each answer.
Discovery of X-Rays

In 1895 Wilhelm Roentgen was experimenting with a cathode 7. and a vacuum tube in his laboratory.

Sometime later he was astonished because a 8. was glowing in his darkened lab.

Roentgen understood that the glow was not coming from a cathode ray tube as it didn’t react to 9. and could not be deflected.

By chance he discovered a radiation which was 10. and he called it x-rays.

Once Wilhelm Roentgen involved his wife Bertha into one of his experiments and he 11. of her hand. They both were surprised and startled as in those days seeing a part of a human’s body on an image was absolutely unbelievable.

A secret door into a hidden universe accidentally opened by the German physicist revolutionized 12. .

This unexpected discovery was immediately recognized world-wide without any 13. and later found its applications in many powerful technologies from medical diagnostics to space exploration.