Mirror anglesRunning
Reflection deck. Incident angle (from the normal) at 73.6 °. Angle to surface + to normal 125.6 °, Right angle 90 °. Currently angle to surface + to normal is over by 35.6 °.TUNING52°73.6°
t = 0.0s

Angle to surface + to normal

125.6°

Right angle

90°

Angle to surface + to normal is over by 35.6 °

73.6 °

Reflection deck. Incident angle (from the normal) at 73.6 °. Angle to surface + to normal 125.6 °, Right angle 90 °. Currently angle to surface + to normal is over by 35.6 °.

What has to balanceθn=90∘−θs\theta_n = 90^\circ - \theta_s

What is happening

You take control of a periscope relay assembled to see over a debris wall.

The image misses the second mirror entirely. The relay drawing puts the incoming ray at 52° to the mirror surface, but the controller wants the angle measured from the normal, and it is set wrong.