Liquid crystal displays: 1. Utilize polarized light. 2. Utilize \"luck lighting\

Question

Liquid crystal displays: 1. Utilize polarized light. 2. Utilize "luck lighting". 3. Utilize thin film transistors. 4. All of the above. Air other things being equal, the most efficient (most power out for a given amount of sunlight) solar cell uses: 1. Direct bandgap semiconductors. 2. Indirect bandgap semiconductors. 3. Silicon 4. None of the above. In the past year, the use of solar power is: 1. Increasing as the price of solar cells decrease. 2. Decreasing as the price of solar cells increase. 3. Remaining constant because it is used mostly in industrial applications. 4. None of the above.

Explanation / Answer

F- (4)

As the fibre optics cable can only be made with glass or plastic. The correct answer is 4.

G-(4)

As Liquid crystal display don't produce their own light , they need addition light to create some image. This is called backlight. A polarized light is used as backlight. Thin film transistors LCD are also a form of liquid crystal display.

So the correct answer is all of the above ,which is 4.

H- (3)

The moncrystalline solar cells are most efficient.

I- (1)

Due to recent advancements in the field of solar energy, the cost of solar cells have decreased as large as 40%.

Hence their use is increased.

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