(1) It is a proscenium theatre, but the proscenium arch is made almost invisible by its dark colour, uniting the audience and actor in a single room.

(2) The broadness of the emission lines is assumed to be a sign of great turbulence in the invisible gas surrounding the galaxy.

(3) Cctv works in the dark by beaming invisible infrared light around the area to be filmed and then using special cameras which can pick up an image.

(4) This gas is completely invisible to human eyes, but because of its temperature, it is visible by its X-ray emission.

(5) Riley buried the pen into his desk, the tip snapping off and flying off to some dark invisible corner.

(6) Most of the Conservative cabinet objected that tariffs would raise food prices, hinder exports, and jeopardize the invisible earnings of the City of London.

(7) Because, she knew, home was where they were going to ignore her; home was where she was as invisible as a pedestrian along a road at night.

(8) She looked again at the nearly invisible church against the dark night sky.

(9) And at this age, when you're totally invisible , you really have to work three times as much just to stay where you are.

(10) For the video projection the frame is not the surface of the wall but the dark invisible space between the projector and the wall.

(11) Against a dark backdrop, invisible footlights pick out Paganini's lithe silhouette, sheathed in a formal black suit.

(12) Graphic sex and violence bring to the fore what polite society refuses to acknowledge about its sadistic desires and invisible victims.

(13) The flatness of the universe indicates that most of the matter in it is invisible , or dark.

(14) The large, dark tabby was almost invisible under dim light, despite his four white feet.

(15) It was nearing nighttime now, and the ebon coloration of the building coupled with the equally dark landscape rendered it invisible after dusk.

(16) It is much easier and can be highly profitable to transmit invisible commodities.

(17) A non-political person is invisible to a politician; thus many of us are ignored when we try to speak out.

(18) Pragmatically it was also an attempt to assure the retention of London as a key international financial centre, with consequent invisible earnings accruing to the country.

(19) It's tricky to tell a story on TV about an invisible gas that might be injected deep underground sometime in the distant future.

(20) But it was all hidden underground, invisible to passersby.