Consider a radioactive sample with half-life

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

T_{1/2}

. Let

N_0

be the number of undecayed nuclei at

t=0

N_1

t=T_{1/2}

and

N_2

t=2T_{1/2}

. Which one of the following relations is correct? (a)

N_2 = \dfrac{3}{4}N_0

(b)

N_1 = N_0

(c)

N_2 = \dfrac{1}{2}N_1

and

N_1 = \dfrac{1}{2}N_0

(d)

N_2 = \dfrac{1}{2}N_0

and

N_1 = \dfrac{3}{4}N_0