In a Fraunhofer diffraction at single slit of width d with incident light of wavelength 5500 Ã, the first minimum is observed, at angle 30^∘. The first secondary maximum is observed at an angle θ= at angle 30^∘. The first secondary maximum is observed at an angle θ= In a Fraunhofer diffraction at single slit of width d with incident light of wavelength 5500 Ã the first minimum is observed November 13, 2020 Category: AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry Video Solutions , Chapter 16 - Waves , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related