(1) Unlike its electrical predecessor, an optical switch does not convert the signal to an electrical impulse before directing it.

(2) The new system should help remove the optical trickery that occurs when assistant referees fail to position themselves correctly on the sidelines.

(3) Concerning the question of optical aids, there is a possible answer well short of the use of lenses, mirrors, or a pinhole camera obscura.

(4) Despite the efforts of some art historians to suggest that Vermeer literally transcribed what he saw with optical aids, such was not the case.

(5) An optical light microscope or a scanning electron microscope can be used to see these u251cu00f6u251cu00e7u251cu2510invisibleu251cu00f6u251cu00e7u251cu00fb cracks.

(6) The controversy over the use of optical aids by early Renaissance painters is crossdisciplinary and emotionally charged.

(7) Currently, most optical fibers are made of solid glass, with pulses of light traveling through the core.

(8) Counting how many Pleiads you can see without optical aid is a good test of both your vision and observing conditions; most people see 6 or 7.

(9) Hooper declared at the outset of his book that optical toys could hone visual perception and, consequently, prime social vigilance.

(10) An optical lattice is a light grid created by the interference of two or more laser beams.

(11) This mismatch, he says, militates against the Hockney-Falco claim that the painter relied on optical aids.

(12) You may be able to watch Jupiter disappear - an event known as immersion - without optical aid, though binoculars help.

(13) Created with a rear-screen optical printer and mattes cut out of construction paper, A Man Whose Life Was Full of Woe has a rough, ecstatic collage quality.

(14) The forward periscope is replaced by a passive optical periscope for night-time manoeuvres.

(15) Such a device might one day become the CPU of an optical computer.

(16) The same optical illusion is in the second act.

(17) In addition, in bioengineering the low-power demands of this technology are promising for use in hearing aids and optical prosthetics.

(18) For some, the use of optical aids compromises genius, and art with it.

(19) Normally, when Christine and I do any serious bird watching, it is with the Core Team and their plethora of optical aids and identification tomes.

(20) Strobes and pyrotechnics nestle amongst shadow puppetry, while a vast array of other optical and audio effects assist in the delivery of this fast-moving tale.