Annular Eclipse in the morning of May 10. The shadow of the New Moon fell on planet Earth, crossing Queensland’s Cape York in northern Australia for the second time in six months. Image © Courtesy Cameron McCarty – MWV Observatory
The sunrise behind Mount Rainier casts a sky-spanning shadow that looks almost like a dark beacon emanating from the top of the mountain. The photograph was taken by Nick Lippert of Tumwater, Washington.
The illusion works because of the “shadow” that falls on the checkerboard. Lets think of the square that the shadow falls on. Now picture that the shadow doesnt exist, you would see a light colored square surrounded by the dark colored squares.