1. Explain the difference between diffraction and interference. Which of these effects occur in a single-slit and which occur in double-slit experiments? 2. [n a single-slit experiment, prove that the width of the central maximum is about twice the distance between adjacent minima. 3. In a double-slit experiment, using a 650 nm diode laser, you measure a distance of 0.13 i 0.01 cm between adjacent maxima in the interference pattern. If the measured slit-to-screen distance is 98.0 i 0.1 cm, what is the slit spacing, d? (Include an uncertainty estimate in your result). Show your work