Who discovered radioactivity? Give a brief account of the first observ

1.	Who discovered radioactivity? Give a brief account of the first observation of radioactivity.
Answer» Antoine Henri Becquerel (1852-1908), French physicist, discovered radioactivity in 1896. He had kept photographic plates wrapped in a thick black paper in a drawer of his desk. Later, he also kept uranium salts near the photographic plates. After some days he developed the photographic plates and was surprised to find that they were fogged although he had protected them from light. Becquerel concluded that uranium salts must be emitting some invisible rays which affected the photographic plates. In this way, radioactivity was discovered by Becquerel.

Who discovered radioactivity? Give a brief account of the first observation of radioactivity.

Answer»

Antoine Henri Becquerel (1852-1908), French physicist, discovered radioactivity in 1896.

He had kept photographic plates wrapped in a thick black paper in a drawer of his desk. Later, he also kept uranium salts near the photographic plates. After some days he developed the photographic plates and was surprised to find that they were fogged although he had protected them from light. Becquerel concluded that uranium salts must be emitting some invisible rays which affected the photographic plates. In this way, radioactivity was discovered by Becquerel.

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