Question

How are grayscale images displayed on a black and white CRT screen?

a.

By using three electron guns.

b.

By altering the colors of the phosphor dots.

c.

By varying the intensity of the electron beam.

d.

By utilizing beam penetration technique.

Posted under Human Computer Interaction

Answer: (c).By varying the intensity of the electron beam. Explanation:On a black and white CRT screen, grayscale images are displayed by varying the intensity of the electron beam. This alteration in intensity allows the display of different shades of gray, from black to white.

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Q. How are grayscale images displayed on a black and white CRT screen?

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