You pass 630 nm light through a vertical rectangular narrow slit and observe the diffraction pattern on a screen 6 m away. The wide of the central fringe is 24 mm. 1) Is the diffraction pattem on the screen, are vertical or horizontal lines? 2) Find the wide of the slit. 3) Find the angle of the first dark fringe.

You pass 630 nm light through a vertical rectangular narrow slit and observe the diffraction pattern on a screen 6 m away. The wide of the central fringe is 24 mm. 1) Is the diffraction pattem on the screen, are vertical or horizontal lines? 2) Find the wide of the slit. 3) Find the angle of the first dark fringe.