# UMass Amherst PHYSICS 132 - Physics 132 lab 2 (3 pages)

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## Physics 132 lab 2

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## Physics 132 lab 2

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Pages:
3
School:
University of Massachusetts Amherst
Course:
Physics 132 - Intro Physics II
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Physics 132 Section MV Guy Rosin Wave Optics Abstract In this experiment we tested how illuminating light through a series of different slits could diffract light We examined the patterns made by the light to see how it diffracts When light is sent through a double slit it makes bands of dark bright spots When it is sent through a single slit it makes it gets diffracted off the straight edge of the slit The different patterns were able to tell us when the light was in phase and when it was out of phase Questions 1 Wavelength is the distance that it takes for the wave to go from crest to crest The frequency is the measure of the number of periods that occur in a set amount of time When frequency is high the wavelengths are short and when frequency is low wavelengths are longer The relationship is shown by the equation f c 2 The pattern observed from diffraction around a straight edge was that it spread out after it bounced off the edge We saw this when the light was shined through a slit I think that light is a wave It moves in a wavelike pattern and expresses wavelike patterns when it comes into contact with other objects 3 When the light was illuminated through the straight edge opaque disk a very bright spot shown on the center of the screen and there were duller spots next to it This happened because the most concentrated wavelengths are in the center of the screen 4 We used laser light so the light would be concentrated into a certain area so we could conduct experiments with it It also made it easier to see because all the light around us is white light so it would be challenging to 5 distinguish between the two a If the wavelength increased then the width of the central maxima would also increase b If the slit width a decreased then the central maxima would still increase 6 The blue light would be diffracted to the distance y 15 1cm I figured this out by first looking at the numbers given for red The equation I set up was y l m wavelength d Filling in the

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