Don't Believe Everything You See (or: "Your Eyes Never Lie")

(So what's the big deal?)

Answer these questions: 1)   At which point (0-9) does the grey dot change colour? (Or "tone" if you must.) Answer: Highlight (click and drag) this box to reveal the answer... It doesn't. The dot stays the same colour all the way from left to right, and back again. Its colour remains RGB#8B8B8B all the time.

Now try number 2... 2)   The moving grey dot is closest in colour to the background colour of the big grey box at: 0, 5, or 9 ? Answer: Highlight (click and drag) this box to reveal the answer... Yes to all three The background colour is the same as the moving dot. It remains RGB#8B8B8B all the way from left to right. (It doesn't change)

If you don't believe me, I don't blame you... You should prove #2 first. Take two pieces of paper and cover the first and second "moving dot" graphics. Like so Now decide whether the grey background is one colour, or if it does indeed darken to the right. OK? Now that you agree (!) that the background of the box is only one shade of grey, make the dot stop when it hits the far left. (Do this by pressing <Esc> or clicking <Stop>.) Start it moving again by reloading or refreshing (from your cache, hopefully). See? Its the same as the background at both ends... and the background is constant, right? Do you still trust what your eyes see? Everything is relative.

Break out of this frame.