Uranium-234 has a half-life of 246,000 years. How did we measure that if the technology to do that hasn’t been around that long?
In: Chemistry
The same way a police officer doesn’t need to watch your car for 80 miles to know you were doing 80 mph in a 60 mph zone. The speed at which you travel a shorter distance can be extrapolated to miles per hour. The amount of U-234 remaining after X time starting with a known quantity can be extrapolated to show at what point 50% would be expected to remain.
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