What is happening
You are called to a laser survey line entering a flooded tunnel.
The beam is missing the far marker. It must leave the water at 32°, water is 1.33, air is 1.00, and the incoming angle is wrong.
Incident side
0.18
Exit side
0.7
Optics bench. Incident angle at 10.2 °. Incident side 0.18 , Exit side 0.7 . Currently incident side is short by 0.528.
What is happening
You are called to a laser survey line entering a flooded tunnel.
The beam is missing the far marker. It must leave the water at 32°, water is 1.33, air is 1.00, and the incoming angle is wrong.