Write4U
Valued Senior Member
Yoiu are not qualified to assert that.Not enough for the afterimage. Especially in total darkness.
You conveniently failed to mention that the flashlight is in constant motion. Ever twirled a sparkly in the dark?LOL! If it was an afterimage it would look like the narrow beam of a flashlight. Ghosts don't look like that. They appear on camera and to the naked eye as human figures.
yes, it is the after image, but strangely it has changed color. So it is not a real afterimage of the lilac dot, that's why it is called an optical illusion.The green dot is the afterimage from seeing the lilac dot. You evidently don't even understand your own example.
yes, it proves my point.