Question

Justify L +L = L and L – L =L. According to the physics chapter units and measurement.​

Answer 1

Answer:

Principle of Homogeneity :

By Principle of Homogeneity, the physical quantities which have same dimensions can be added, subtracted or compared.

Here, [L] + [L] = [ L] and [L] - [L] = [L]

The two quantities can be added or subtracted,if they have same dimension or dimensional formula.

Answer 2

Answer:

l+l=l

l-l=l

this is due to the fact that same quantities can be added or subtracted

...therefore the physical quantity  will remain same

Explanation: