Homework - EE 119 Homework 11 Professor: Jeff Bokor TA: Xi...

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EE 119 Homework 11 Professor: Jeff Bokor TA: Xi Luo 1. General diffraction questions (a) How many wavelengths wide must a single slit be if the first Fraunhofer diffraction minimum occurs at an angular distance of 30 degrees from the optic axis? (b) Lycopodium seeds, which are of spherical shape and nearly uniform size, are dusted on a glass plate. If with parallel light of 640nm wavelength the angular radius of the first diffraction maximum is 2 degrees, estimate the size of the seed. (c) If the headlights of an approaching car are 122cm apart, what is the maximum distance at which the eye can resolve them? Assume the pupils of 4mm in diameter and light of 500nm wavelength. Consider diffraction limit only. 2. Diffraction grating. A molecule sometimes emits light at 600nm and sometimes emits light at 650nm. You want to determine the relative intensity of emission at these two wavelengths, so you decide to split the light with a diffraction grating and direct the two first-order diffracted beams of different colored light onto two
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Homework - EE 119 Homework 11 Professor: Jeff Bokor TA: Xi...

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