dimensional constants, dimensionless quantities

Dimensional Constants:

• Dimensional constants are physical quantities that have the same dimension or dimensionless.
• Examples of dimensional constants include the speed of light, the gravitational constant, and the electrical conductivity of a vacuum.
• Dimensional constants are used in the formulation and verification of physical laws and theories, helping to ensure their accuracy and validity.

Dimensionless Quantities:

• Dimensionless quantities are physical quantities that have no units and do not depend on any particular system of units.
• Examples of dimensionless quantities include ratios, percentages, and angles.
• Dimensionless quantities are useful in comparing and describing physical phenomena that are independent of the particular system of units used to measure them.