1. The problem statement, all variables and given/known data A fine hair separates one end of two pieces of flat glass to form and air wedge.when light of wavelength 670 nm is incident normally, 25 dark bands are observed (with one at each end).How thick is the hair? 2. Relevant equations destructive interference: 2nt = (m+1/2)lambda 3. The attempt at a solution I really have no idea how to solve this problem, or even what a diagram would look like. Is the glass positioned like a tipi? Where is the light hitting the glass, and where are the bands even being observed? Thanks in advance!