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jan 1, 1896 - Antoine Henri Becquerel

Description:

French physicist Antoine Henri Becquerel's experiments led to the discovery of radioactivity. He observed that the element uranium can blacken a photographic plate, even though separated from it by glass or black paper. He also observed that the rays that produce the darkening are capable of discharging an electroscope, indicating that the rays possess an electric charge.

Added to timeline:

2 months ago
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atomic and nuclear physics

Date:

jan 1, 1896
Now
~ 123 years ago

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