Solved Quiz 7 - Electromagnetic Waves, Optics and Special Relativity | PHYS 4D, Quizzes of Physics

Download Solved Quiz 7 - Electromagnetic Waves, Optics and Special Relativity | PHYS 4D and more Quizzes Physics in PDF only on Docsity! Quiz 7 Problem 1 (Ch. 35, Problem # 7) If a slit diffracts 580-nm light so that the diffraction maximum is 6 cm wide on a screen 2.2 m away, what will be the width of the diffraction maximum for light with a wavelength of 460 nm? Solution: tan 6, = zou > & 4a 73° = Jz Sonn sm 6, = “AL 9 42,53] ame D nee | ay, = bem de Py D > b= 262° ton, = ath > 44, ap ton O, {48 om | Ls 2.2m —s| smw6, = Problem 2 (Ch. 35, Problem # 35) Red laser light from He-Ne laser (2 =632.8 nm) is used to calibrate a diffraction grating. The light creates a second-order fringe at 53.2° after passing through the grating. The light of an unknown wavelength A creates a first-order fringe at 20.6°. Find A. Solution: 1 = 20. 6° , (bas £3,2° sr (Vr 2 an pam Asm, = ahy \heco.- 2K, = sae sins, ma20.6° _{e 7 Gham > Nye 2 SR ae a SEE 65a.g nm = [5 C ion Problem 3 (Ch. 35, Problem # 42) The first-order line of 589-nm light falling on a diffraction grating is observed at a 16.5° angle. How far apart are the slits? At what angle will the third order be observed? Solution: d sw 6 = mA dsmé = a-4K a sm 6, > B= sm! (A