Question: In a hypothetical radioactive material, the total number of active photons are 20000 and the decay constant is found out to be 4.916 X 10-17 per second. How much of the material will be left in a 100 years? (1 year = 365 days. Leap year is not assumed in the calculations)
Options
A : 1589.99999
B : 19,999.9999
C : 19.999999
D : 123.99999
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