The Wave Nature of Light - Sections 24.4 - 24.6

Announcements Review Diffraction by a Single Slit Final QuestionsQuestionLight of wavelength 633 nm is incident on a narrow slit. The angle between the first diffraction minimum on oneside of the central maximum and the first minimum on the other side is 1.20 ◦ . What is the width of the slit?AnswerThe width of the slit is given bywhere θ is measured from the center linea = mλsinθIn this problem, m = 1 and θ = 0.60 ◦ (why?)Therefore, solving for a, we find thatm = 1,2,3,...a = (1)(6.33 × 10−7 m)sin(0.60 ◦ )= 6.04 × 10 −5 m = 60.4 µmThe Wave Nature of Light