What Are the Essential Concepts Every Physicist Should Know?

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Essential concepts every physicist should know include foundational topics like Lagrangian mechanics, the principle of least action, Poisson brackets, and electromagnetism. The discussion highlights the challenge of acquiring basic knowledge in physics, with a request for guidance on fundamental concepts. Leonard Susskind's book, "The Theoretical Minimum," serves as a valuable resource for those seeking a mathematical introduction to these theories. The book is part of a series aimed at providing a solid grounding in theoretical physics. Engaging with such resources can help bridge gaps in understanding for aspiring physicists.
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I've been into physics for years now but no matter how much a study, i find that i always lack basic knowledge that others seem to have. I was wondering could someone provide me (if possible) with a list of fundamental concepts every physicist should know? i imagine the list might be to long or infinite but any sort of footing would help. This is my first post so please excuse me if it is to general.
 
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https://en.wikipedia.org/wiki/The_Theoretical_Minimum

The Theoretical Minimum: What You Need to Know to Start Doing Physics (ISBN 0-465-02811-X) is a 2013 popular science book by Leonard Susskind and https://en.wikipedia.org/w/index.php?title=George_Hrabovsky&action=edit&redlink=1 . The book is a mathematical introduction to various theoretical physics concepts, such as Lagrangian mechanics, principle of least action, Poisson brackets, and electromagnetism. It is the first book in a series called The Theoretical Minimum, the second of which is https://en.wikipedia.org/w/index.php?title=Quantum_Mechanics:_The_Theoretical_Minimum&action=edit&redlink=1 .

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Thank you for the recommendation, I will definitely be checking it out!
 

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