Air (n = 1.00)  
    -------------------  ← ← ← ← ← ← ← ← ← ← ← ← ← ← ← 
       |  
       |  
       |   θ₁ = 0°  
       |   

Water (n = 1.33)
|
------------------------- ← ← ← ← ← ← ← ← ← ← ← ← ← Pool Surface (where light exits) |
|
↓ Light ray traveling straight up (along the normal)