Interpreting Half-Life Graphs | GCSE Physics Practice
Half-life can be determined accurately by plotting activity against time on a line graph.
How many half-lives have passed if activity drops to 25%?
What is Interpreting Half-Life Graphs | Practice?
"Graphical representations of radioactive decay used to determine the half-life of a radioactive sample."
Which type of radiation is stopped by a single sheet of paper?
Niels Bohr changed the atomic model by suggesting that electrons ____.
Which type of radiation is an electromagnetic wave?
What is the definition of half-life?
Decay Curves
Find the starting activity (at t=0).
Half this value on the vertical axis.
Read across to the curve, then down to the horizontal axis.
The time value found is the half-life.
Verification: Always do a "second half-life" check. Half the value again and ensure the time interval is the same as the first one.
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