Category
page 1Dimensionless quantities
refractive index
ratio of the speed of light in vacuum to that in the medium
dimensionless quantity
quantity with no physical dimension
Lorentz factor
factor 1∕√(1−𝑣²∕𝑐²) in special relativity expressing how much the measurements of time, length etc. change for a moving object
relative density
ratio of the density (mass per volume) of a substance to the density of a given reference material
linear strain
relative change of length with respect the original length
relative change and difference
techniques used to compare two quantities