question_answer

How does the angular separation between fringes in single-slit diffraction experiment change when the distance of separation between the slit and screen is doubled?               

Answer:

                Angular separation between diffraction fringes, \[\theta =\frac{\beta }{D}=\frac{\lambda }{d}\] When the distance (D) between the slit and screen is doubled, the angular separation \[\theta \] remains unchanged.