  Due to the recent interest in studying propagation of light through
triangular air gaps, we calculate, by using the analogy between optics and
quantum mechanics and the multiple step technique, the transmissivity through a
triangular air gap surrounded by an homogeneous dielectric medium. The new
formula is then compared with the formula used in literature. Starting from the
qualitative and quantitative differences between these formulas, we propose
optical experiments to test our theoretical results.
