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c current passes out of the electrolyte; the negative pole; -- opposed to anode. Faraday. Cathode ray (Phys.), a kind of ray generated at the cathode in a vacuum tube, by the electrical discharge.

The part of a vacuum tube opposite the cathode. Upon it the cathode rays impinge.

A picture produced by the Röntgen rays; a radiograph.

e by which the current enters the electrolyte on its way to the other pole; -- opposed to cathode.

of negatively charged particles or electrons, apparently the same in kind as those of the cathode rays, but having much higher velocities (about 35,000 to 180,000 miles per second).

The condition of increased irritability of a nerve in the region of the cathode or negative electrode, on the passage of a current of electricity through it.

An electro-positive substance, which in electro-decomposition is evolved at the cathode; -- opposed to anion. Faraday.

The dark space within the negative-pole glow at the cathode of a vacuum tube, observed only when the pressure is low enough to give a striated discharge; -- called also Crookes layer.

Negative electricity, the electricity that appears at the negative pole or cathode, or is produced by the friction of resinous substance; -- called also resinous electricity. (h) Organic electricity, that which is developed in organic structures, either animal or vegetable, the phrase animal electricity being much more…

are interchangeable. -- Focus tube (Phys.), a vacuum tube for Roentgen rays in which the cathode rays are focused upon the anticathode, for intensifying the effect. -- Principal, or Solar, focus (Opt.), the focus for parallel rays.

Rays (chiefly cathode rays) developed by the electric discharge in Hittorf tubes.

The negative pole or cathode. [R.]

Rays emanating from the outer surface of a plate composed of any material permeable by cathode rays, as aluminium, which forms a portion of a wall of a vacuum tube, or which is mounted within the tube and exposed to radiation from the cathode. Lenard rays are similar in all their known properties to cathode rays. So ca…

A cathode. [R.]

Capable of luminescence under the action of cathode rays, X rays, or any of the allied forms of radiation. -- Ra`di*o- ac*tiv"i*ty, n.

Any of the rays produced when cathode rays strike upon surface of a solid (as the wall of the vacuum tube). Röntgen rays are noted for their penetration of many opaque substances, as wood and flesh, their action on photographic plates, and their fluorescent effects. They were called X rays by their discoverer, W. K. Rö…

shown esp. by certain substances that have been exposed to the action of light or to the cathode rays. ---lu`mi*nes"cent (#), a.