A spacer is cut from a playing card of thickness 3.12 x 104 m and used to separate one end of two rectangular, optically flat, 3.30 cm long glass plates with n = 1.60, as in the figure below. Laser light at 594 nm shines straight down on the top plate. HINT (a) Count the number of phase reversals for the interfering waves. 1050 (b) Calculate the separation (in m) between dark interference bands observed on the top plate. m Need Help? Read It

A spacer is cut from a playing card of thickness 3.12 x 104 m and used to separate one end of two rectangular, optically flat, 3.30 cm long glass plates with n = 1.60, as in the figure below. Laser light at 594 nm shines straight down on the top plate. HINT (a) Count the number of phase reversals for the interfering waves. 1050 (b) Calculate the separation (in m) between dark interference bands observed on the top plate. m Need Help? Read It