they're invisible because they are in such a highly quantized state that they have surpassed the visible light spectrum
however NASA has cameras that can see into the near UV spectrum and they show up plain as day on their cameras
this highly energetic state doubles as cloaking device but the primary function would be the ability to travel at high speeds without the problem of mass due to the mass being so highly energized it loses not only visual detection but mass too
What are you talking about? So a UV light bulb becomes lighter when it is switched on?
Absolute nonsense, Marshall.