Question

Goldstein called the rays as canal rays because :

• A. rays were in the shape of canal
• B. rays couldn't pass through holes in cathode
• C. rays pass through the holes or channels
• D. none of the above

Answer 1

The correct option is C rays pass through the holes or channels

In 1886, Eugen Goldstein noted that cathode-ray tubes with a perforated cathode emit a glow from the end of the tube near the cathode. Goldstein concluded that in addition to the electrons, or cathode rays, that travel from the negatively charged cathode toward the positively charged anode, there is another ray that travels in the opposite direction, from the anode toward the cathode. Because these rays pass through the holes, or channels, in the cathode, Goldstein called them canal rays.