In standardized, isotropic media, electromagnetic radiation is a diagonal wave, meaning that its oscillations are perpendicular to the direction of energy transmission and travel. The magnetic and electric parts of the field stand in a stable ratio of strengths in order to satisfy the two Maxwell equations that state how one is created from the other. In a dissipationless (lossless) media, these B and E fields are also in point, with both failure minima and maxima at the same points in space. A simple misconception is that the B and E fields in electromagnetic radiation are out of point due to a change in one generates the other, and this could yield a phase difference between them as sinusoidal roles (as indeed occur in EM induction, and in the near-field close to antennas). Still, in the far-field electromagnetic radiation which is termed by the two source-free Maxwell curl operator a righter description is that a time-change in one kind of field is relative to a space-change in the other. These results need that the B and E fields in electromagnetic radiation are in-phase.