[Utilizer]

Light is RF.

Beg to differ, mate. Started out on CB transceivers, and 27MHz RF is not "Light" by any stretch of the imagination.

As far as not passing through walls, for between rooms all you need is a light pipe with convex ends. Or an Active Repeater, if you do not mind the latency. External, who doesn't know what an "Antenna" is?

[E. Pluribus Unum]

Beg to differ, mate. Started out on CB transceivers, and 27MHz RF is not "Light" by any stretch of the imagination. As far as not passing through walls, for between rooms all you need is a light pipe with convex ends. Or an Active Repeater, if you do not mind the latency. External, who doesn't know what an "Antenna" is?

Radio waves and light are just different wavelengths on the electromagnetic spectrum.

[SoothingDave]

27MHz RF is not "Light" by any stretch of the imagination.

He said light was RF. He did not say all RF was light.