What is Physics? | Physical World Class 11 Notes & Origins

Understanding the roots of Science and Physics helps us decode the mysteries of the universe. 

 Internal Links

 * The Scientific Method: 5 Steps to Discovery

 * Fundamental Forces of Nature: From Gravity to Nuclear

 * Units and Measurements: The Language of Physics

 * Great Physicists Who Changed the World

Would you like me to generate the content for a "Fundamental Forces" section to link to next? 

-Dr.Sanjaykumar pawar

 wed25March9:30p.m

Chapter 1: The Physical World

What is Science?

Science is a systematic attempt to understand natural phenomena in as much detail and depth as possible. We use the knowledge gained from this study to:

• Predict: Anticipate what will happen.
• Modify: Change certain conditions.
• Control: Manage the outcome of phenomena.

Language	Word	Meaning
Latin	Scientia	To know
Sanskrit	Vijnan	Knowledge
Arabic	Ilm	Knowledge

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What is Physics?

"Physics is a study of the basic laws of nature and its manifestation in different natural phenomena."

Physics helps us understand how the universe behaves, from the smallest particles to the largest galaxies.

Etymology of Physics:

• Greek Origin: Derived from the word "Fusis", which signifies Nature.
• Sanskrit Equivalent: The word "Bhautiki" is used to refer to the study of the physical world.

Visualizing the Physical World

A breakdown of the definitions and origins of our understanding of nature.

The Concept of Science

From Latin "Scientia"

It is the process of gathering knowledge to understand the 'why' behind everything.

The Concept of Physics

From Greek "Fusis"

It is the study of the actual laws that govern the behavior of the material universe.

Linguistic Mapping (Real Data)

Subject	Root Word	Origin Language	Core Meaning
Science	Scientia	Latin	To Know / Knowledge
Physics	Physis / Fusis	Ancient Greek	Nature
Vijnan	Vijnana	Sanskrit	Discerning Knowledge
Bhautiki	Bhuta	Sanskrit	Physical / Material World

The Goal of Scientific Study

We don't just learn for the sake of it. Science follows a specific functional path:

Predict

→

Modify

→

Control

Explanation:
1. Predict: Use math to guess future events (like an eclipse).
2. Modify: Change variables to see different results.
3. Control: Use the laws to build technology (like using gravity for satellites).

Physical World: Practice Set

Section A: Multiple Choice Questions (NEET Pattern)

NEET / AIIMS

Q1. The word 'Physics' comes from the Greek word 'Fusis' which means:

• A) Knowledge
• B) Nature
• C) Matter
• D) Motion

View Solution

Correct Answer: B
Explanation: The term originates from the Greek 'Physis' (Fusis), signifying nature.

Section B: Assertion and Reason

CBSE 2026 Pattern

Assertion (A): Science is ever-evolving and no theory is final.

Reason (R): New observations and experiments may lead to modifications of existing laws.

View Solution

Answer: Both (A) and (R) are true and (R) is the correct explanation of (A).

Section C: Very Short Answer Questions (1 Mark)

Q2. What is the meaning of the Sanskrit word 'Vijnan'?

View Solution

Answer: It means 'Knowledge'.

Section D: Short Answer Questions (2-3 Marks)

Q3. Distinguish between the scope of Classical Physics and Quantum Physics.

View Solution

Classical Physics deals with macroscopic phenomena (large scale), while Quantum Physics deals with microscopic phenomena at the atomic and molecular level.

Section E: Long Answer Questions (5 Marks)

Q4. Explain the systematic steps involved in the 'Scientific Method'.

View Solution

1. Systematic Observations
2. Controlled Experiments
3. Qualitative and Quantitative Reasoning
4. Mathematical Modeling
5. Prediction and Verification/Falsification of Theories