Which of the following best describes the shape of a plot of the number of undecayed…
PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics
Problem
Which of the following best describes the shape of a plot of the number of undecayed nuclei N versus time t for a radioactive sample?
(a) A straight line decreasing uniformly from left to right
(b) A step-like graph that drops by one-half at each equal time interval
(c) A curve that falls rapidly at first and then more slowly, approaching the time axis without touching it
(d) A curve that rises rapidly at first and then levels off to a constant value