1. Monochromatic light is incident on a pair of slits that are separated by 0.220 mm. The screen is 2.40 m away from the slits. (Assume the small-angle approximation is valid here.)
(a) If the distance between the central bright fringe and either of the adjacent bright fringes is 1.87 cm, find the wavelength of the incident light. ___________ m
(b) At what angle does the next set of bright fringes appear? ____________ °
2. Monochromatic light of wavelength 487 nm is incident on a single slit. The second-order diffraction minimum is at an angle of 7.80 ✕ 10−3 rad. What is the width of the slit?
