The half-life of a radioactive substance is 10 days; it means there will be
A. Complete decay of substance in 20 days
B. Complete decay of substance in 40 days
C. Decay of $$\frac{3}{4}$$ part of substance in 20 days
D. Decay of $$\frac{1}{4}$$ part of substance in 5 days
Answer: Option C
This Question Belongs to Physics GK Chapter Wise >> Modern Physics
Related Questions on Modern Physics
. . . . . . . . invented Atom Bomb.
A. J Robert Oppenheimer
B. John Bau a Ning
C. Samuel Cohan
D. Samuel Colt
A. when low speed electrons is ejected
B. when high speed electron is obstructed by a metal surface
C. when anode-ray obstructed by a solid object
D. when γ-ray is obstructed by a solid object
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