a) Two narrow slits, separated by 2 mm are illuminated by light of wavelength 588 nm from a sodium lamp. Find the spacing of the fringes observed on a screen 4.3 m away. Give your answer with units. Number Units b) In a lecture demonstration of single-slit diffraction, the beam from a solid-state laser pointer (of wavelength 635 nm) is passed through a vertical slit,0.17 mm wide, and hits a screen 5.9 m away. Find the width of the central maximum, ie the distance between the first zeros of intensity on each side of the central beam. Give your answer with units. Number Units

a) Two narrow slits, separated by 2 mm are illuminated by light of wavelength 588 nm from a sodium lamp. Find the spacing of the fringes observed on a screen 4.3 m away. Give your answer with units. Number Units b) In a lecture demonstration of single-slit diffraction, the beam from a solid-state laser pointer (of wavelength 635 nm) is passed through a vertical slit,0.17 mm wide, and hits a screen 5.9 m away. Find the width of the central maximum, ie the distance between the first zeros of intensity on each side of the central beam. Give your answer with units. Number Units