Physics · 2014 · May · Paper 3 · SL · TZ1 · Question paper

38 pages M14/4/PHYSI/SP3/ENG/TZ1/XX Thursday 8 May 2014 (afternoon) Physics sTANDARD level PAPeR 3 INSTRUCTIONS TO CANDIDATES • Write your session number in the boxes above. • Do not open this examination paper until instructed to do so. • Answer all of the questions from two of the Options. • Write your answers in the boxes provided. • A calculator is required for this paper. • A clean copy of the Physics Data Booklet is required for this paper. • The maximum mark for this examination paper is [40 marks]. Option Questions Option A — Sight and wave phenomena 1 – 3 Option B — Quantum physics and nuclear physics 4 – 5 Option C — Digital technology 6 – 7 Option D — Relativity and particle physics 8 – 10 Option E — Astrophysics 11 – 14 Option F — Communications 15 – 17 Option G — Electromagnetic waves 18 – 20 1 hour © International Baccalaureate Organization 2014 Examination code 2 2 1 4 – 6 5 1 2 [Personal identifier removed] [Personal identifier removed] – 2 – M14/4/PHYSI/SP3/ENG/TZ1/XX Option A — Sight and wave phenomena 1. This question is about diffraction and resolution. Two identical sources of electromagnetic radiation, S 1 and S 2, emit monochromatic coherent waves of wavelength 59 μm. The waves pass through a circular aperture and are incident on a screen. opaque wall screen source S2 source S1 0.25 rad θ aperture (not to scale) S1 and S 2 are at the same distance from the aperture. The diameter of the aperture is 0.18 mm. The angle between the lines joining the sources to the aperture is 0.25 rad. (a) S 1 is turned on and S2 is turned off. (i) Show that the angle at which the first minimum of the diffraction pattern occurs is 0.40 rad. [1] ................................................................. ................................................................. (Option A continues on the following page) 40EP02