Which is most difficult concept to learn or to understand in PHYSICS ?

Question

Classical Mechanics

Electromagnetism

Thermodynamics

Quantum Mechanics

Relativity

AstroPhysics

Atomic, Molecular and Optical Physics

Particle Physics

Condensed matter physics

Or

Any thing Else,

Answer 1

Quantum mechanics
Even though you can handle the math(which is advanced calculus)the concepts violate the common sense are really hard to understand and only few people 'really' understood it.And there are some contreversies(ie than two people made mathematical equations for these field one is shrodinger and i forgot the other one(who discovered about anti matters)many physicists laughed at him when he wrote about antimatters and his equations obey the laws in relativity

Answer 2

I'm not particularly sure if anyone else here is actually a physics major or has a degree in physics, but the large number of people who answered by saying "quantum mechanics" are hugely mistaken. QM is one of the easier subjects, although it does have a number of strange predictions. However, you get used to it and build an intuition - I already have (I'm taking Quantum Mechanics at the moment and have sat in on our Quantum Theory class.) What people struggle with most - atleast at my university on the undergraduate level - is actually classical mechanics (the upper level version - NOT the intro version. Doing impossible problems with Hamiltonians and Lagrangians, coupled pendula, etc.) People dread taking that class - its thought to be the hardest class that undergraduate physics majors have to take here. I can see E&M being more difficult at other schools simply because we have a great introduction during our sophomore year to E&M that is far less rigorous at other schools (basically, they made the intro course impossibly hard so that the later course seems easy in comparison.)

As far as physics topics go in general, the most difficult by any account is General Relativity, which takes a great deal of differential geometry to understand. Actually, what I should say is that if you already understand differential geometry, then General Relativity is medium range in difficulty - but that's because learning differential geom is most of the struggle.

Answer 3

Thermodynamics has applications to everything so no matter how much you learn there is still more to learn.

I found Quantum Mechanics impossible to really understand but the mathematical formalisms can be learned. Particle Physics is probably also in this category but I never studied it, just watched the TV shows.

Answer 4

I would say Quantum physics because it uses a great deal of advanced math like calculus . As for general relativity if you try to picture concepts while solving it becomes easy

Answer 5

Particle Physics is probably the hardest concept to grasp, or Quantum Mechanics to some, but it is a bible to me.

Answer 6

I hated physics. I pulled off an A in the class and I actually understood it then but I do not remember what any of that stuff means.

Answer 7

Relativity and Quantum mechanics are not intuitive, and are based on very abstract mathematical concepts.

Answer 8

nothing is difficult in physics but the more important is to connect all the concepts of physics with your daily life and try to assimilate it you will automatically get your answers.

Answer 9

every concept in physics is difficult to learn or to understand!!!!!

Answer 10

Relativity and Astrophysics