"You mean float visitors through the air?"
"No. You'd need the power of ten maritime atomic piles in series just to lift Dr. Gesner to the height of—"
"Very funny!"
"—his own square root. What they can do with that machine is to disguise an object—say the incoming leaf tobacco. They can make it look firm, golden, and so forth. The girls at the sorting tables, wherever the guided tour happens to be, will all look like Norma Norden. They'll be dressed as angels and work in heaven. Then the V.I.P.s can tour the girls' homes and dormitories, and instead of a dirty slum, they'll see—they'll see mushrooms, if they like."
"How is it done?"
"Only Barger Electronics really knows," said Dr. Brooks, "and the Christian E. Lodge engineers. It's something to do with compressing the wave length to approximate that of light, so that images are canceled out. This leaves a clear field for subliminal techniques. If there are subvisual images projected on the walls, for instance, that's what the observers will see inside the room."
"Oh, my God!" exclaimed Miss Knox.
"The only other thing I know is that it has to be done with intersecting spheres. The machine has two portable secondary transmitters—or projectors, or whatever they call them—each emitting in all directions to form a wave-sphere. Where the two spheres overlap, you get your possible interference with light."
"Frankly, I just don't understand it."
"Any radio waves go out in all directions to form spheres." His voice had become a mutter. "You know that."