Physics is the study of fundamental laws governing natural phenomena. It deals with the most basic aspects of nature, including force, motion, heat, sound, matter, electricity, magnetism, and light. Physics seeks to discover the basic rules that describe physical phenomena through observation and experimentation. It is divided into classical and modern physics. Classical physics includes mechanics, wave physics, thermodynamics, electromagnetism, and optics, while modern physics covers atomic, nuclear, and quantum physics. Physics forms the foundation of other sciences like biology, chemistry, geology, and astronomy, as well as various engineering fields.

1. INTRODUCTION TO
PHYSICS

2. Sunrise in the morning Sunset in the evening

3. Heat & light from burning Yellow orange colour of sky

4. Falling of objects Birds flying in the sky

5. Formation of ocean waves Sinking of objects

6. Spherical shape of soap bubbles Moon orbiting around the earth

7. • In order to play cricket, football, chess, hockey or any other
game we follow some rules
• Similarly, the physical phenomena of our nature follow some
rules or principles

8. DISCOVER
BASIC LAWS
NATURE
PHYSICAL
PHENOMENA
OBSERVATION
Falling of an apple
from a tree
Orbiting of the moon
around the earth
Newton Observed
Laws of motion
Law of Gravitation

9. Physics is the study of various physical
phenomena and the fundamental laws
governing them.
PHYSICS
NOTE: The laws of physics are not invented by people,
they are only discovered

10. • Physics is a natural science
(Deals with natural phenomena)
• Physics is a physical science
(Deals with our physical world)
• Physics is a fundamental science
(Deals with most basic things of nature)

11. Force Motion
Heat
Sound
Matter
Electricity Magnetism
light
MOST BASIC THINGS OF NATURE

12. Natural Phenomena
Physical Chemical Biological
Formation of rainbow
Formation of clouds
Conversion of wood
into ash
Rusting of iron
Pumping of blood
by heart
Exchange of gases
through lungs

13. BRANCHES OF
PHYSICS

14. PHYSICS
Classical Physics Modern Physics
Developed before
19th century
Developed after
19th century
• Classical mechanics • Atomic physics
• Wave physics
• Thermodynamics
• Electromagnetism
• Optics
• Nuclear physics
• Quantum mechanics

15. CLASSICAL MECHANICS
Classical mechanics is the study of effects produced by a force.
Motion of a car Loading on a bridge Working of hydraulic machines

16. WAVE PHYSICS
Wave physics is the study of effects produced by a vibration
or an oscillation.
Sound produced by a violin
To and fro motion of swing Waves on water surface

17. THERMODYNAMICS
Thermodynamics is the study of effects produced by a heat.
Expansion of mercury in a
thermometer
Working of an engine Working of a refrigerator

18. ELECTROMAGNETISM
Electromagnetism is the study of effects produced by an electric
charge or a magnet.
Working of a speaker Generation of electricity
Working of an UPS inverter

19. OPTICS
Optics is the study of effects produced by light.
Image produced by a plane
mirror
Colour of the sky
Eyesight correction using
spectacles

20. ATOMIC PHYSICS
Atomic physics is the study of the structure of an atom and
characteristics of subatomic particles.
Working of a LASER
Neon sign board Working of X-Ray Machine

21. NUCLEAR PHYSICS
Nuclear physics is the study of an atomic nuclei and their
constituent particles.
Carbon dating
Working of Radiotherapy
Machine
Nuclear power generation

22. QUANTUM MECHANICS
Quantum mechanics deals with the behavior of matter and energy
at atomic scale.
Magnetic Resonance Imaging
Smart phones Electron microscope

23. IMPORTANCE OF
PHYSICS

24. Without knowledge of fundamental
principles of physics
Biologists cannot understand
• How brain controls our body?
• How plants carryout photosynthesis?

25. Without knowledge of fundamental
principles of physics
Chemists cannot understand
• Why firework produce different colours?
• How Goldplating works?

26. Without knowledge of fundamental
principles of physics
Geologists cannot understand
• Formation and eruption of lava
• Why earthquake occurs?

27. Without knowledge of fundamental
principles of physics
Astronomers cannot understand
• How planets revolve around the sun?
• Why stars shine in night sky?

28. PHYSICS
The Foundation Of Science

29. Without knowledge of fundamental
principles of physics
Civil Engineers cannot design buildings,
bridges, dams, overhead water tanks etc.

30. Without knowledge of fundamental
principles of physics
Mechanical Engineers cannot design
automobiles, space vehicles, wind turbines,
machines etc.

31. Without knowledge of fundamental
principles of physics
Electrical Engineers cannot design power
substations, transformers, motors, electrical
panels etc.

32. Without knowledge of fundamental
principles of physics
Electronic Engineers cannot design circuits,
antenna, radar system, robotic arm etc.

33. PHYSICS
The Foundation Of Engineering

34. THANK
YOU