関連ワード:  width of fringe in diffraction    width of central fringe in diffraction    width of bright fringe in diffraction    width of dark fringe in diffraction    width of central bright fringe in diffraction    width of central bright fringe in diffraction formula    width of second bright fringe in diffraction    width of central bright fringe in diffraction phenomenon is given as    angular width of bright fringe in diffraction    formula of fringe width in diffraction