70. In beam penetration method of color CRT, which layer is red and which is green a. Outer is red and inner is green b. Inner is red and outer is green c. Inner is red and inner is green d. None
Option A is correct, Explanation - A beam of slow electrons excites the outer red layer only; hence screen shows red color only. A beam of high-speed electrons excites the inner green layer. Thus screen shows a green color.
