Page 37 - DCAP313_LAB_ON_COMPUTER_GRAPHICS

Unit 2: Graphics Systems

of the three primary colours used in colour video. These three primaries (red, green, and blue) Notes
are combined at the CRT to yield eight colours.
Figure 2.18: Simple Colour Buffer

Self Assessment Questions

6. The display devices are known as …………….. devices.
( a) input (b) output
( c) storage (d) None of these
7. The operations of most video monitors are based on the standard ……………… design.

( a) raster-scan-system (b) Random Scan Display
( c) cathode-ray-tube (d) None of these
8. Deflection System of the electron beam can be controlled by either ……………..

( a) electric or magnetic fields (b) magnetic or electric field
( c) magnetic field (d) None of these
9. Raster-scan system displays have ………… resolution.
( a) high (b) less

( c) high to less (d) None of these
10. It is the ratio of ……………… to produce equal length lines in both directions on the screen.
( a) vertical to horizontal (b) horizontal to vertical

( c) only horizontal (d) only vertical
11. A raster scan system, the electron beam is swept across the screen ……..…. at a time from
top to bottom.
( a) two row (b) three row
( c) one row (d) one too many
12. The function of a plotter is like a…………….

( a) monitor (b) projector
( c) printer (d) None of these

LOVELY PROFESSIONAL UNIVERSITY 31