How does autofocus work? Active autofocus works by calculating the distance to the object and passive autofocus works by using contrast sensors to analyze the image. How does a camera focus? Cameras focus in the same way that our eyes do. Light waves are reflected off objects and they enter our eyes or a camera. […]
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Shuji Nakamura invented the blue LED, without which we wouldn’t be able to have white LEDs, and we would be damaging the environment even more than we are at the moment. To make white light, you need to have red, green, and blue light in equal quantities. We perceive single wavelengths of light in the
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When was the first drone? The first real drone was built in 1917 to counter German bombers or to deliver bombs. Drones are technically known as unmanned aerial vehicles (UAV) and drone is more of a nickname. They became known as drones in 1946, but the name came from one of the first successful drones
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How can planes fly upside down? Because of the shape of their wings and the angle that they fly at. Planes fly because of lift. Air is not an empty substance. It has molecules in the same way as a table or a chair. The air is made up of nitrogen, oxygen, carbon dioxide, neon,
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