A) Rontgen
B) Madam Curie
C) Rutherford
D) All of these
Correct Answer: A
Solution :
In 1895, German scientist Prof. Rontgen observed that when fast moving cathode rays strike a metal piece of high atomic weight and high melting point a new kind of rays are produced. These rays are invisible to eye but effect the photographic plate in the same way as do the light rays. He named these rays as X-rays. These rays are also known Rontgen rays.
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