A student and his lab partner create a single slit by carefully aligning two razor blades to a separation of 0.550 mm. When a helium-neon laser at 633 nm illuminates the slit, a diffraction pattern is observed on a screen 1.55 m beyond the slit. Calculate the angle θdark ​ to the first minimum in the diffraction pattern and the width of the central maximum. (a) the angle θdark ​ to the first minimum in the diffraction pattern (in degrees) (b) the width of the central maximum (in m)