The word Pixel in the photo is created by placing small water drops on the laptop screen tilted at 180 degree. Why Pixel? It is so because, pixel are the smallest display unit combined together in the form of grid to make a screen. Each pixel is made of strips of three colours Red, Green and Blue, hence the term RGB. This RGB combines together to form displaying colour of that pixel. Since, water drops acts like a lens, we are able to see the RGB strip of pixels on the screen.