Physics Chapter-1 Physical World Class-11th Easy Notes for HBSE/CBSE Board
Physics Chapter-1 Physical World Class-11th Easy Notes for HBSE/CBSE Board
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Physics Chapter-1 Physical World of Class-11th What is Science?Science is the way we ask questions about the world, find answers through careful observation, and test them to understand how things work. Definition of Physics:-Physics is the branch of science which deals with matter, energy, and their interactions. It explains how and why things happen in the physical world. For Example- Why does an apple fall? How do planets move? Two Fundamental Principles of Physics:- |
1) Unification
2) Reductionism
Unification:-
Unification means joining different laws or forces that seem unrelated into one single rule that explains them all together.
Example:-
Scientists found that electric force and weak nuclear force are actually the same at high energies.
Rare Fact:-
Scientists today are working on a “Theory of Everything” — a single law to explain all the four fundamental forces of nature.
Why It’s Important:-
- Learning many separate rules, we learn one big rule that explains more.
- Helps us understand the universe better
Reductionism:-
Reductionism is the idea that big, complex things can be fully understood by studying their smallest, simplest parts.
Examples:-
- Understanding the brain scientifically
- A computer is complex, but it’s built from simple logic gates and circuits.
- A room full of air (gas)
Rare Fact:-
Even emotions in humans can be reduced to signals between brain cells — that’s reductionism at work in biology + physics.
Why It’s Important:-
- Helps us solve complex problems by studying basic building blocks.
- Used in science, engineering, and medicine.
