Q. Half-life of radium is 1600 yr. Its average life is
A) 3200 yr
B) 4800 yr
C) 2309 yr
D) 4217 yr
Explanation
(c) $\tau_{m} = 1.442\ T$
$T = 1.442 \times 1600 = 2308\ yr$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.