Question

6.When was radioactivity discovered?
7. When was CD invented?
8. When was the first movie made?

Answer 1

$<b>$Heyaaa mate

Here is your answer:-

6) Radioactivity is discovered in 1896.

7) CD was invented in 1877.

8) In 1895 it was discovered , but the time taken for first movie was 1878 - 1961.

Hope it helps you

Thanks

Answer 2

6. The radioactivity is discovered by Henri Bacquerel in 1896.

7. The first audioCD player, the Sony CDP-101, was released October 1982 in Japan.