3 Xray diffraction of DNA You have now seen how a regular array of lines (slits) produces a diffraction pattern if the spacing of the lines is comparable to the wavelength of the light used to form the pattern. The spacing of atoms in the DNA molecule is of the order of 10\"-J m (0.1 nm), and so it is necessary to use Xrays (wavelength 0.071 nm; very high energy) to produce the diffraction patterns by allowing the Xrays to interact with the electrons in the atoms. However it is possible to reproduce the Xray diffraction pat tern using visible light (wavelength N 500 Elm) provided that the size of the structure being examined is also scaled 11p by a factor of N 50003:. For this purpose, we can cre ate diffraction patterns using a transparency containing ar rays of lines with features on the scale of 104 to (100 Imm) and which behave like arrays of slits in place of the DNA ber. Use the images in the \"DNA (lirzmtion im ages\" as evidence in support of your answers in this sec tion. .00....- . O O I I O c cocoon-o doc..- I. 1. Examine the simulated diffraction patterns, above. Which patterns result from diraction by a set of vertical lines and which result from diffraction by an array of horizontal lines