The vacuum or free space, what observations are made?

ویکیوم یا خالی جگہ ، کون سے مشاہدات کیے جاتے ہیں؟

p = 0, J = 0

p = po, J = 0

p = 0, J = J

None of these

In a vacuum or free space, there are no particles or matter, so:

Pressure (p) is zero.
Current density (J) is also zero, since there are no charged particles to carry current.

Therefore, the correct observation is p = 0, J = 0.