Step Tablet
Take two small pieces of paper and place them on the video screen so that you can see only one of the steps. You will probably notice that this step appears uniformly bright across its horizontal extent. However, when you view all the steps at once, each one appears lighter on the left and darker on the right.
The dashed red line represents the brightness function of the average physical luminance of each step. The solid line represents the apparent brightness of the steps.
Fun Things
Table of Contents
Subject Index
Table of Contents [When not using framtes]