Physics: Main Branches of Physics

What is Physics?

The word “Physics” comes from the Greek word “Physikos” meaning “natural”. Physics is defined as a science which deals with the interaction of matter and energy.
Physics helps to get the answers of queries as to:
I. Where and how clouds are formed?
ii. How lightning flashes in the clouds?
iii. Why some objects catch fire and others do not?
iv. What is the nature of heat? How is it produced?
v. How matter appears ¡n different states?


Main branches of physics are given below:
1. Mechanics: It deals with the motion of objects with or without reference to force.
2. Electricity: It ¡s Concerned with the phenomena and effects related to electric charges.
3. Electromagnetism: It deals with observations, principles, laws, and methods that relate
electricity and magnetism.
4. Solid State Physics: It ¡s concerned with the structure and properties of solid materials.
5. Atomic Physics: It is concerned with the structure and properties of solid material.
6. Nuclear physics: this branch is concerned with the structure arid properties of the atom.
7. Plasma Physics: It ¡s concerned with the properties of highly ionized atoms forming a mixture
of bare nuclei (nuclei without electrons) and electrons.
8. Biophysics: It is concerned with the application of physical methods and explanations to biophysical systems and structure.
9. Astrophysics: It is concerned with the study of the physics of astronomical bodies.
In addition to these branches also there are other branches, say low-temperature physics,
particle physics, optics, etc.)


Physics is involved in one way or the other, physics is playing a vital in framing our lifestyle and influencing our way of thinking.
1. Electrical appliances
We use several electrical appliances. For example, electric fan, electric bulb, refrigerator, air conditioner, juicer, grinder, etc. they all use “electricity”.

2: Engines
Busses, cars, railway carriages, airplanes, etc. are run by engines. The engine of these vehicles are manufactured on the principles of “thermodynamics”.
3: Electronic Devices
We listen to radio programmers and telecast from TV stations. In all electronic devices and
Appliances “solid-state physics” plays a vital role.
4: Laser Technology
Laser technology is widely used in defense systems, metallurgy, medical science, and astronomy which has its roots in “atomic physics”.
5:Nuclear Physics
Production of nuclear energy is the area of “nuclear physics”

And Many more fields……

List of Physics Articles

  1. Mechanics

    1. Kinematics
      1. Motion and its type
      2. Distance and displacement Differences
      3. Speed and Velocity with comparison table
      4. Acceleration and its types
      5. Three Equations of motion
      6. The motion of a Freefall
      7. Projectile motion
    2. Dynamics I: Force
      1. Forces with Types
      2. Force and mass
      3. Action-reaction
      4. Weight
      5. Dynamics
      6. Friction and its types
      7. Forces in two dimensions
      8. Centripetal force formula
      9. Centrifugal force
      10. Difference between centripetal force and centrifugal force
      11. The inertial and non-inertial frame of reference
    3. Energy
      1. Work and its formula
      2. Energy and its types
      3. Kinetic energy with examples
      4. Potential energy with examples
      5. Conservation of energy derivation
      6. Power and its equation
      7. Simple machines with examples
    4. Dynamics II: Momentum
      1. Relation between Impulse and momentum
      2. Conservation of momentum Examples
      3. Momentum and energy relation
    5. Rotational motion
      1. Rotational kinematics
      2. Rotational inertia with examples
      3. Rotational dynamics With examples
      4. Angular momentum with formula
      5. Rotational energy and its formula
      6. Rolling
    6. Planetary motion
      1. Geocentrism theory
      2. Heliocentrism theory
      3. Universal gravitational Law
      4. Gravitational potential energy formula
      5. The gravity of extended bodies
    7. Periodic motion
      1. Springs
      2. Simple harmonic motion with examples
      3. Simple Pendulum
      4. Resonance and its examples
      5. Elasticity and its Examples
    8. Fluids
      1. Density formula
      2. Pressure formula
      3. Buoyancy force
      4. Fluid flow
      5. Viscosity examples
      6. Drag force
      7. Pascal law
      8. Archimedes principle
      9. Bernoulli Equation
      10. Equation of continuity
  2. Thermal physics

    1. Heat and temperature
      1. Temperature and its scales
      2. Difference between heat and temperature
      3. Thermal expansion examples and applications
      4. Gas laws
      5. Kinetic-molecular theory
    2. Calorimetry
      1. Sensible heat
      2. Latent heat of fusion and vaporization
    3. Heat transfer
      1. Conduction heat transfer
      2. Convection heat transfer
      3. Radiation heat transfer
    4. Thermodynamics
      1. Heat and work
      2. Heat Engines
      3. Refrigerators
      4. Examples of entropy
      5. Absolute zero
  3. Waves and optics

    1. Wave phenomena
      1. The nature of waves and their properties
      2. Periodic waves examples
      3. Interference and superposition
    2. Sound Waves
      1. The nature of sound
      2. Intensity of sound
      3. Doppler effect and its cases
      4. Shock waves examples
      5. Diffraction and interference differences
      6. Standing waves examples
      7. Beats
      8. Music and noise comparison
    3. Physical optics
      1. The nature of light
      2. Polarization examples
      3. Doppler effect (light)
      4. Diffraction and interference (light)
      5. Interference Of light
      6. Colors and their types
    4. Geometric optics
      1. Reflection of light
      2. Refraction of light
      3. Spherical mirrors uses
      4. Spherical lenses types and applications
      5. Aberration and its types
  4. Electricity and magnetism

    1. Electrostatics
      1. Electric charge and its Types
      2. Coulomb’s law formula
      3. Electric field and electric field lines
      4. Electric potential formula
      5. Gauss’s law and its applications
      6. Conductors and insulators
      7. Difference between emf and potential difference
    2. Electrostatic applications
      1. Types of Capacitors
      2. Dielectric materials
      3. Types of Batteries
    3. Current Electricity
      1. Electric current formula
      2. Electrical resistance
      3. Electric power and its formula
    4. DC circuits
      1. Types of Resistors in circuits
      2. Types of Batteries in circuits
      3. Capacitors in circuits
      4. Kirchhoff’s rules
    5. Magnetostatics
      1. Magnetism
      2. Electromagnetism and its applications
      3. Ampère’s law formula
      4. Electromagnetic force
    6. Magnetodynamics
      1. Electromagnetic induction and its applications
      2. Faraday’s law of induction
      3. Lenz’ law of induction
      4. Inductance
    7. AC circuits
      1. Alternating current
      2. RC circuits
      3. RL circuits
      4. LC circuits
    8. Electromagnetic waves
      1. Maxwell’s equations
      2. Electromagnetic waves
      3. Electromagnetic spectrum
  5. Modern physics

    1. Relativity
      1. Space-time
      2. Mass-energy
      3. General relativity
    2. Quanta
      1. Blackbody radiation
      2. Photoelectric effect
      3. X-rays
      4. Antimatter
    3. Wave mechanics
      1. Matter waves
      2. Atomic models
      3. Semiconductors
      4. Condensed matter
    4. Nuclear physics
      1. Isotopes
      2. Radioactive decay
      3. Half life
      4. Binding energy
      5. Fission
      6. Fusion
      7. Nucleosynthesis
      8. Nuclear weapons
      9. Radiobiology
    5. Particle physics

      1. Quantum electrodynamics
      2. Quantum chromodynamics
      3. Quantum flavordynamics
      4. The Standard Model
      5. Beyond the Standard Model
  6. Foundations

    1. Units
      1. International system of units
      2. Gaussian system of units
      3. British-American system of units
      4. Miscellaneous units
      5. Time
      6. Unit conversion
    2. Measurement
      1. Significant digits
      2. Order of magnitude
    3. Vectors
      1. Trigonometry
      2. Vector addition and subtraction
      3. Vector resolution and components
      4. Vector multiplication
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