Question

why magnetic susceptibility of vacuum is zero​

Answer 1

Thus, when susceptibility is zero (because there is no matter to polarize), the relative permittivity is 1. Chetan, you argument is that, since there is nothing to distort in vacuum, the permittivity should be zero, because there is no energy to be stored without distortions.

Answer 2

Explanation:

When susceptibility is zero (because there is no matter to polarize), the relative permittivity is 1. Chetan, you argument is that, since there is nothing to distort in vacuum, the permittivity should be zero, because there is no energy to be stored without distortions.