CUET Preparation Today
CUET
Physics
Nuclei
The half life of a radioactive substance is 20 s. The decay constant is
$0.0346\, s^{-1}$
$0.693\, s^{-1}$
$2 × 10^{-6} s^{-1}$
$3.46 × 10^{-6} s^{-1}$
The correct answer is Option (1) → $0.0346\, s^{-1}$
