All questions
AP Physics 2
14.8 Double-Slit Interference and Diffraction Gratings
14.7 Diffraction
AdvancedMCQGraphicalMathematicalConceptual20.2k
A graph of relative intensity I/I_0 on the vertical axis versus position x on the horizontal axis. The horizontal axis has a central origin labeled 0, with tick marks spaced evenly at x_0, 2x_0, 3x_0, 4x_0 on the right and -x_0, -2x_0, -3x_0, -4x_0 on the left. A smooth curve displays a double-slit interference pattern modulated by a single-slit diffraction envelope. The central diffraction envelope spans from x = -4x_0 to x = +4x_0, dropping to zero intensity at x = -4x_0 and x = +4x_0. Inside this envelope, narrow interference peaks occur at x = 0 with relative intensity 1.0, x = \pm x_0 with relative intensity 0.85, x = \pm 2x_0 with relative intensity 0.50, and x = \pm 3x_0 with relative intensity 0.15. At x = \pm 4x_0, where an interference peak would otherwise appear, the intensity is exactly zero due to the envelope minimum. Outside x = \pm 4x_0, much smaller secondary envelopes appear with low-intensity peaks. No other labels, lines, text, or axes appear.
Relative intensity versus position on the screen for double-slit interference modulated by diffraction.
Coherent monochromatic light of wavelength \(\lambda\) is incident on two parallel slits, each of width \(a\), separated by center-to-center distance \(d\). The resulting intensity pattern on a screen far from the slits is shown in the graph of relative intensity \(I/I_0\) as a function of position \(x\). Based on the graph, what is the ratio \(d/a\) of the slit separation to the individual slit width?

Log In to Continue

Accounts are free! Log in to try this question, see explanations, save progress, and more!

Similar Questions

Tools for a 5

The Quiz Lab library of AP Physics quizzes AP aligned mock tests to help you get a 5. With grading, adaptive explanations, and more. Find a Quiz Find, solve, and grade every AP FRQ ever. Find an FRQ Stuck on AP Physics 2? Get unstuck with an AP specialist.1 to 1 tutors who know the exam inside out. Understand weeks of material in a single session.Find a Tutor Learn AP Physics from scratch, quickly. This is the only course you'll need for the year. A self-paced course with everything you need to get a 5. Trusted by over 15,000 students and 200+ schools. Learn fast, or we'll refund your purchase, backed by our 100% satisfaction guarantee. Explore the Course