A tunable laser illuminates a double slit that has slit separation equal to slit width (i.e., d=a). Initially the laser is tuned to a wavelength of 633 nm, that produces a first order maximum (m=1) at 4.1 mm from the central maximum on a viewing screen that is 1.3 m from the double slits. Later, one of the slits is blocked and the laser is re-tuned to a wavelength of 450 nm. At what distance, L, is the viewing screen located to produce a single slit first order minimum (p=1) at 4.1 mm from the central maximum?

A tunable laser illuminates a double slit that has slit separation equal to slit width (i.e., d=a). Initially the laser is tuned to a wavelength of 633 nm, that produces a first order maximum (m=1) at 4.1 mm from the central maximum on a viewing screen that is 1.3 m from the double slits. Later, one of the slits is blocked and the laser is re-tuned to a wavelength of 450 nm. At what distance, L, is the viewing screen located to produce a single slit first order minimum (p=1) at 4.1 mm from the central maximum?