Is introduction to Electrodynamics belong here.

yungman
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If I have question in EM at level of "Introduction to Electrodynamics" by David Griffiths, should I post here or in the Introduction to Physics?
 
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Here. Generally problems from lower-division courses belong in the introductory physics forum while problems from upper-division courses belong here.
 
Thanks. Then I know to come here next time.
 
You're lucky your professor uses Griffiths. Mine uses Reitz, its terrible by comparison. I brought Griffiths to supplement where my book is weak. They do compliment each other though...

Good luck with your course
 
To solve this, I first used the units to work out that a= m* a/m, i.e. t=z/λ. This would allow you to determine the time duration within an interval section by section and then add this to the previous ones to obtain the age of the respective layer. However, this would require a constant thickness per year for each interval. However, since this is most likely not the case, my next consideration was that the age must be the integral of a 1/λ(z) function, which I cannot model.

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