Assertion             :       The film which appears bright in reflected system will appear dark in the transmitted light and vice-versa. Reason                 :   The conditions for film to appear bright or dark in reflected light are just reverse to those in the transmitted light.

                   For reflected system of the film, the maxima or constructive interference is 2μtcosr=(2n−1)λ2 while the maxima for transmitted system of film is given by equation 2μtcosr=nλ where t is thickness of the film and r is angle of reflection. From these two equations we can see that condition for maxima in reflected system and transmitted system are just opposite.