# A quick-reference guide to all physics symbols

Physics is the topic where we experience it in our daily lives knowingly or unknowingly. So, while performing basic or complex calculations in physics, we include physical quantities. These physical quantities are represented by notations/symbols to provide convenience to physics users for easy to use and remember.

These notations/symbols are simply known as symbols. These symbols may vastly differ since some physical quantities may have their first letter as a symbol or may have completely unrelated letters as a symbol. In some cases, the physical quantities may have Greek symbols as their symbols.

However, let’s see some of the physics symbols related to modern physics, thermal physics, mechanics, electricity and magnetism, waves and optics, space and time, Along with their names, physical quantity and S.I units.

The below table comprises a category-wise list of physics symbols.

Physics symbols related to modern physics

 Physical Quantity Symbol S.I Unit Scalar/Vector Dose/Dose Absorbed D Gray scalar Wave Function ψ(r,t), ψ(r)φ(t) Unitless vector Work Function Φ Joule scalar Effective Dose H Sievert scalar Lorentz Factor/Lorentz Gamma Unitless scalar

Physics symbols related to thermal physics

 Physical Quantity Symbol S.I Unit Scalar/Vector Coefficient Of Performance Cop Unitless Scalar Ways, Number Of Identical Microstates W Unitless Scalar Entropy S Joule Per Kelvin Scalar Internal Energy U Joule Scalar Emissivity Ε Unitless Scalar Thermal Conductivity K Watt Per Meter Kelvin Scalar Heat Flow Rate P Watt Scalar Number Of Particles N Unitless Scalar Amount Of Substance N Mole Scalar Latent Heat/Specific Latent Heat L Joule Per Kilogram Scalar Specific Heat Capacity C Joule Per Kilogram Kelvin Scalar Heat Q Joule Scalar Volume Expansivity, Coefficient Of Volume Thermal Expansion B Inverse Kelvin Scalar Linear Expansivity, Coefficient Of Thermal Expansion Α Inverse Kelvin Scalar Temperature T Kelvin Scalar

Physics symbols related to mechanics

 Physical Quantity Symbol S.I Unit Scalar/Vector Velocity, Speed v Meter Per Second Vector Acceleration a Meter Per Second Squared Vector Centripetal/Centrifugal Acceleration ac Meter Per Second Squared Vector Acceleration Due To Gravity g Meter Per Second Squared Vector Mass m Kilogram Scalar Force F Newton Vector Force Due To Gravity/Weight Fg /W Newton Vector Normal Force Fn, N Newton Vector Force Of Friction Ff Newton Vector Coefficient Of Friction Unitless Scalar Momentum p Kilogram Meter Per Second Vector Impulse J Newton Second Vector Energy E Joule Scalar Kinetic Energy K Joule Scalar Potential Energy U Joule Scalar Gravitational Potential Vg Joule Per Kilogram Scalar Efficiency η Unitless Scalar Power P Watt Scalar Rotational Speed, Rotational Velocity Radian Per Second Vector Rotational Acceleration Radian Per Second Squared Vector Torque Newton Meter Vector Moment Of Inertia I Kilogram Meter Squared Scalar Angular Momentum L Kilogram Meter Squared Per Second Vector Angular Impulse H Newton Meter Second Vector Spring Constant k Newton Per Meter Scalar Pressure p Pascal Scalar Stress Pascal Scalar Shear Stress T Pascal Scalar Density, Volume Mass Density Kilogram Per Cubic Meter Scalar Area Mass Density Kilogram Per Square Meter Scalar Linear Mass Density Kilogram Per Meter Scalar Buoyancy FB, B Newton Vector Mass Flow Rate qm Kilogram Per Second Scalar Volume Flow Rate qv Cubic Meter Per Second Scalar Drag Or Air Resistance FD, R Newton Vector Drag Coefficient CD Unitless Scalar Viscosity Pascal Second Scalar Kinematic Viscosity v Square Meter Per Second Scalar Mach Number Ma Unitless Scalar Reynolds Number Re Unitless Scalar Froude Number Fr Unitless Scalar Young’s Modulus Of Elasticity E Pascal Scalar Shear Modulus Of Rigidity G Pascal Scalar Bulk Modulus Of Compression K Pascal Scalar Linear Strain Unitless Scalar Shear Strain Unitless Scalar Volume Strain Unitless Scalar Surface Tension Newton Per Meter Scalar

Physics symbols related to electricity and magnetism

 Physical quantity symbol S.I Unit Scalar/vector Pointing vector, intensity S Watt per square meter Vector Energy density Joule per cubic meter Scalar Turns per unit length n Inverse meter Scalar Number of turns N Unitless Scalar Magnetic flux B Weber vector Magnetic field B Tesla Vector Magnetic force FB Newton Vector Conductivity Siemens per meter scalar conductance G Siemens scalar Resistivity Ohmmeter scalar Electric resistance/internal resistance R, r ohm scalar Electric current I Ampere scalar Dielectric constant ϵ Unitless scalar Capacitance C Farad scalar Electromotive force (EMF) volt scalar Voltage, electric potential V Volt scalar Electric potential energy UE Joule scalar Electric flux E Newton meter squared per coulomb Vector Electric field E Newton per coulomb/volt per meter Vector Electrostatic force FE Newton Vector Linear charge density Kilogram per meter Scalar Area charge density Kilogram per square meter Scalar Volume charge density Kilogram per cubic meter Scalar Electric charge q, Q Coulomb Scalar

For the quick guides of physics symbols related to space and time & waves and optics, visit the list of physics symbols. Here you can find all the physics symbols in detail.

All the physics symbols we have discussed here and included for quick reference cover almost all major physics symbols, which are up to date and helpful for that sudden grasping moment.

## The bottom line

Physics is not only that subject where we will learn only in school or colleges but also we live in this world which is filled with great physics examples and knowingly or unknowingly, we are the part of physics where gravity, tension, mass, weight, time, distance, force, energy, current are already part of us.

To understand physics, knowing about both subjects and taking real-life examples as us will help grasp the subject correctly. One important saying goes like “understanding the sentences are way different and far from understanding the essence and true meaning of the sentences”.

So, to sum up, this quick guide is just for you so that you don’t confuse the Greek symbols. Just sit back and give a good reading and understanding of the Greek symbols and names to have at least the basic idea. But don’t forget to give a quick look for these symbols right before exams because you don’t want to lose significant grades for not having a quick look.