What are the essential concepts for a physics graduate to understand?

[TonyS]

Hello all, I studied physics a little, many years ago and I occasionally rake over the embers to amuse myself, so, here I am.

 

[jedishrfu]

Welcome to PF!

So I guess you are fascinated with the thermodynamics of old embers.

What other areas of physics interests you?

 

[TonyS]

Thanks for the welcome.

I think my interest is mainly in understanding the maths and physics that any physics graduate would be expected to understand, prior to specialisation.
Plus a little quantum field theory and general relativity (one day, maybe).