In this graph, the x-axis is labeled "(lambda)'in" and includes no measurement indicators. The y-axis is labeled "(lambda)out," and its top-most point is labeled "R/2." A blue line begins at the intersection of the x- and y-axes and extends upwards to the right at a 45-degree angle. At about the halfway point on the x-axis, the line curves and drops sharply, and then curves away from the y-axis and runs just above the x-axis, parallel to it.