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Why is the Sky Blue?

On a clear sunny day, the sky above us looks bright blue. In the evening, the sunset puts on a brilliant show of reds, pinks and oranges. Why is the sky blue? What makes the sunset red?

To answer these questions, we must learn about light, and the Earth’s atmosphere.

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Remote Operated Spy Robot

Here is a remote operated spy robot circuit which can be controlled by using a wireless remote controller. It can capture audio and video information’s from the surroundings and can be sent to a remote station through RF signals. The maximum range is 125 meters. It overcomes the limited range of infrared remote controllers. This robot consists of mainly two sections. They are explained in detail below.

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Changing the Color of Light

Changing the Color of Light

Researchers have developed a method that could improve medical imaging and cancer treatments and increase the efficiency of commercial solar cells by 25 to 30 percent.

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