Lecture #1 1/3: Coordinates, Maxwell and radiation

New channel Laboratorij za sevanje in optiko FE: title sample judged 'whole' (A university lab channel of full lecture series, technical talks, and hands-on demonstrations on antennas/RF/optics that); passed a second screen for sellers/exam-prep/re-uploads; 1 of 3 sampled transcripts showed teaching, 0 not; every title checked strictly; oEmbed verified.