1A. Light of wavelength passes through a double slit, yielding a diffraction pattern whose graph of intensity I versus angular position 0 is shown in Fig. below. The first diffraction minimum is at 0 = 5.0 and the second interference maximum for m =2 is at 0 = 2.5 ). If the light wavelength A = 540 nm is used, (a) Calculate the slit separation d. (b) Calculate the slit width a.
Intensity (mW/cm2)
(degrees)