Imagine there is a light source farthest to the right. Which bar would accurately reflect how you expect the light to decrease from the source? It should be the

Imagine there is a light source farthest to the right. Which bar would accurately reflect how you expect the light to decrease from the source? It should be the second (linear) bar, that the difference between the last few levels of black is imperceptible could be attributed to the fact that the MBA has a quite poor screen.