Question

define length and write SI unit of length

Answer 1

Explanation:

The meter, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s-1, where the second is defined in terms of ΔνCs.

Answer 2

Length is a measure of distance. In the International System of Quantities, length is a quantity with dimension distance.

THE SI UNIT OF LENGTH IS METRE (m).