1.

In vacuum or free space, what observations are made?

A. = <sub>o</sub>, J = 0
B. = 0, J = J<sub>o</sub>
C. = 0, J = 0
D. = <sub>o</sub>, J = J<sub>o</sub>
Answer» D. = <sub>o</sub>, J = J<sub>o</sub>


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