Half-Life - IB Physics

[@elibardash5308]

Math, chemistry, physics... which subject in school DOESN’T talk about half-lives??!!

[@zetace6326]

just thank you for all of your videos

[@abidhara8344]

THANK YOU VERY VERY MUCH

[@abeershaaban4145]

Very Helpful

[@karhukivi]

Radioactive decay is a continuous process, the number of atoms decaying at any instant is proportional to the amount present at that instant. Decay constant (k) is a better way to describe what is happening as it is a fraction or a proportion like depreciation or tax deducted. Decay constant is what is measured in the laboratory, not half-life as some people think and argue as impossible to measure for long-lived (>>60 years) radionuclides. The idea of "half-life" (T½) is just a convenient way to deal with decay constants T½ = ln(2)/k or 0.693/k approx. as the numbers are easier to remember and relate to time. There are people out there that think two half-lives equals one whole life!

[@arshia8769]

hi i just wanted to ask if you have any predictions for the IB may 2023 papers, thank you so much for your lectures btw!!

[@AndyMasley]

Thanks! No predictions at all, I have no inside knowledge for what's on them beyond what's normally assigned on the curriculum.

[@Light-world333]

Thanks sir

[@alienautopsy9326]

What is full life ?

[@AndyMasley]

Technically no such thing because you could keep dividing the sample in half basically forever