Which Branch Of Physics Is The Most Difficult

Which branch of physics is the most difficult?

The most difficult branch of physics is thought to be quantum mechanics. Systems with quantum behavior don’t operate according to the conventional rules; they are difficult to see and feel; they can have contentious characteristics; they can exist in multiple states simultaneously; and they can even change depending on whether or not they are observed. How gravity and the quantum will coexist within the same theory is the most difficult unsolved issue in fundamental physics. To make all of physics logically consistent, one needs quantum gravity [1].The most difficult branch of physics is thought to be quantum mechanics. Systems with quantum behavior don’t behave according to the usual rules; they are difficult to see and feel; they can have contentious features; they can exist in several states simultaneously; and they can even change depending on whether or not they are observed.

What are the three central issues in life?

Where did we come from? Is there life after death? What is the meaning of life? What happens to us after we die? How did so much life appear on our planet when others seem devoid of any species at all? Who, if anyone, controls our universe? Is there some all-knowing god in control or are there physical and mathematical laws that govern our universe? These are the three big questions that have occupied humankind since the beginning of time.