Published on 12, July, 2020
What colour is the dress?(1) blue and black(2) white and gold(3) other
The dress is a photograph that became a viral internet sensation on 26 February 2015, when viewers disagreed over whether the dress pictured was colored blue and black, or white and gold. The phenomenon revealed differences in human colour perception. https://en.wikipedia.org/wiki/The_dress
How many black dots do you see?
I couldn't look at this the dots keep flashing!
That's the illusion, because of the way that the squares and the gaps in between them are positioned, it makes the dots appear to flash or jump so that you can't actually count them.
These websites explain about the psychology of optical illusions a bit:
https://www.verywellmind.com/optical-illusions-4020333
https://www.all-about-psychology.com/optical-illusions.html
Leave it up, it is a great illusion