Consider the setup of double-slit experi- ment in the schematic drawing below. One of the double-slit interference minima is located at the first single-slit diffraction minimum. viewing screen L Determine the ratio - ; i.e., the slit sepa- ration d compared to the slit width a. Use a small angle approximation; e.g., sind = tand = 0 and cos = 1. 1. 2. - =6 3. 4. 5. 6. 7. 8. 191 -1 13 9. 2 10