# Single-Slit Diffraction Pattern

Single-Slit Diffraction Pattern

This Demonstration shows the intensity distribution of one-slit diffraction over a wide range of slit widths so that both Fraunhofer and Fresnel diffraction are covered. You can produce an interference pattern as it would be seen on a screen and the vector sum for any position on the screen. The results are derived from Feynman's method of "integrating over paths" and can be proven experimentally if the light source is a He-Ne laser and the screen is 1 m distance from the slit.