Q1,paper3, j14. Beam-penetration and shadow-mask are the two basic techniques for producing color displays with a CRT. Which of the following is not true ?

I. The beam-penetration is used with random scan monitors.

II. Shadow-mask is used in raster-scan systems.

III. Beam-penetration method is better than shadow-mask method.

IV. Shadow-mask method is better than beam-penetration method.

(A) I and II

(B) II and III

(C) III only

(D) IV only

Answer C.

Beam penetration method uses random scan method whereas  shadow mask uses raster.

Beam penetration has less color and cheap.