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Nuclei

Easy Questions

Modern Physics

Dual Nature of Radiation and Matter
Atoms
Nuclei
Semiconductor Electronics : Materials, Devices and Simple Circuits
  1. A radioactive element has half life period 800 years. After 6400 years what amount will remain?
    1. 1/2
    2. 1/16
    3. 1/8
    4. 1/256
Correct Option: D

No. of half lives,

n =
t
=
6400
= 8
T800

N
=
1
8
N02

=
1
256


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