Question

How does an LCD create an image?

a.

By emitting a stream of electrons.

b.

By utilizing a thin layer of liquid crystal that can twist to alter the plane of polarization of incoming light.

c.

By using plasma cells filled with noble gases.

d.

By using light-emitting diodes.

Posted under Human Computer Interaction

Answer: (b).By utilizing a thin layer of liquid crystal that can twist to alter the plane of polarization of incoming light. Explanation:An LCD creates an image by sandwiching a thin layer of liquid crystal between two glass plates. When voltage is applied, the crystal twists, altering the plane of polarization of incoming light. This process turns the activated cell black or leaves it white, creating an image.

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