advertisement

PHYS375 Review Exam will be in two parts: written and in lab Both parts will be open book and notes Exam Details • Written – Four questions limited to the areas to be discussed next • Lab – About four components you will have to measure and document. You will not have to provide a report but you lab notes should be clear evidence you actually performed the experiment. Theoretical Things to Know 1. Refraction at surfaces – Snell’s law; 2. Critical angles – qB (Brewter’s angle) and qC (total internal reflection); 3. ABCD matrix method with thin lenses; 4. Optical path length; 5. Interference and/or diffraction (Fraunhofer) from single and double slits; 6. Simple spectroscopic instruments – prism and grating spectrometerDispersion (spreading) of light by prisms and gratings; Snell’s law • Problems: 2-5, 2-7, 2-8 and 3-6 ABCD matrix • Only focus on thin lenses and combinations. • Must know matrix multiplication and the meaning of various elements. • Must be able to determine the cardinal points • Example problems: 18-9, 18-11 and applied to 3-24. Fraunhofer Diffraction • Must know how to calculate the field from the diffraction integral. • Know what the diffraction patterns look like for single and double slits, rectangular slit with diffraction in two directions and circular slits. • Must know the relationship between the size of the aperture and the diffraction angle. • Problems: 2 & 3 HW6, 11-9, 11-12 Interference • Problems: 7-1, 7-6 would be good to know. Optical Instruments • • • • Spectrometers with gratings and prisms Gratings problems: 12-1 and 12-3 for example. Prism problems: 3-7 Michelson interferometer problems: 8-3 and 8-5. Lab Things to Know • Should be familiar with all seven (including the 0th lab). • How to keep a record of what you have done. I will be looking for evidence to convict you of having done the lab. – Saying “I aligned the laser” without providing any detail of exactly how will garner very few, if any, points! – Provide a description of what was done with sketches. Lab (cont.) • You will have several pieces of optics to identify – e.g., – blocks of optical material for which you will have to determine n, – apertures for which you will have to determine their size w/o measuring w/ microscope, – Lenses for which you will have to determine f and n, etc. • You will be able to measure with techniques you’ve learned this semester.