In: Physics
Light of unknown wavelength passes through a double slit, yielding both double slit and diffraction patterns on a screen that is 1 m away from the slits. You see that the 9th double-slit maximum coincides with the 2nd single-slit diffraction minimum. You also observe that the first diffraction minimum is located 3 cm from the central axis on the screen.
(a) What is the ratio of double-slit separation to single slit width, d/a?
(b) If d = 72 µm, what is the wavelength of the light?