Question

digital television
a. uses a vacuum tube to accept signals and convert them into light and color on the screen
b. uses a network of stations to transmit signals.
c. provides the illusion of movement by showing a sequence of film over a light source
d. uses pixels that can be turned on and off

please select the best answer from the choices provided

a
b
c
d

Explanation:

• Option a: Vacuum tubes are used in older CRT TVs, not digital televisions. So a is incorrect.
• Option b: Both analog and digital TV can use a network of stations for transmission, so this is not unique to digital TV. Thus, b is incorrect.
• Option c: This describes how film projectors or older analog TV (with cathode - ray tube and raster scanning in a way related to film - like sequences) work, not digital TV. So c is incorrect.
• Option d: Digital television displays images using pixels, and each pixel can be turned on or off (or have different brightness/color levels by controlling the on - off state and color components). This is a key characteristic of digital TV technology.

Answer:

D. uses pixels that can be turned on and off