Which sentence is best explained by a visual?
A. “The manufacture of the large cathode-ray tube proved very interesting.” (Courtesy of www. earlytelevision. org.)
B. “A surprising fact is that all the metal parts, such as the deflecting plates, electron gun, electrodes, etc., are made of pure nickel.” (Courtesy of www. earlytelevision. org.)
C. “It must also remain strong at high temperatures in order to preserve tube characteristics through evacuation and bombardment, and must permit strong spot welds while being rustproof and resistant to corrosion.” (Courtesy of www. earlytelevision. org.)
D. “The assembly of metal and glass parts is mounted on a glass envelope which is generally funnel shaped, and sealed in place.” * (Courtesy of www. earlytelevision. org.)