Two rectangular glass plates (n = 1.60) are in contact along one edge and are separated along the opposite edge (Figure).Light with a wavelength of 600 nm is incident perpendicularly onto the top plate. The air between the plates acts as a thin film. Nine dark fringes and eight bright fringes are observed from above the top plate. If the distance between the two plates along the separated edges is increased by 600nm, how many dark fringes will there then are across the topplate?

Transcribed Image Text:

Incident light