#black beam

The common denominator to the sighting of "black beams" is an atmosphere saturated with metallic chem-haze. In this example the rocket's engine is acting like a projector bulb. The black beam is created by the intense light of engine ignition behind the nose of the Rocket. This is confirmed when the black- beam is pointing in the direction of the Rocket. “The black line appears when the combination of chem-haze and illumination is sufficient to create the black line shadow.”  It may be difficult to visualize, but the metallic chem-haze provides the basis for black-line illusion. In this case the black line appears and disappears depenfing on engine "brightness combined with pockets of atmosphere containing chem-haze. Harold Saivevor