Physics, 07.08.2019 20:30 yddlex

Two rectangular pieces of plane glass are laid one upon the other on a table. a thin strip of paper is placed between them at one edge so that a very thin wedge of air is formed. the plates are illuminated at normal incidence by 545 nm light from a mercury-vapor lamp. interference fringes are formed, with 20.0 fringes per centimeter. find the angle of the wedge?

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