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Physics Lab 11

# Physics Lab 11 - In activity 3 we were trying to compare...

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Conceptual Questions 1. 2. Laser light is only one single wavelength so the refraction has no effect on it and just splits it into different spots of the same color. Analysis: In activity one we set up the laser in order for it to hit the different diffraction gratings and be able to relay that image onto a piece of paper at given distances. The first distance x was .300m and the diffraction grating was 100 lines/mm. We mapped out the different beams and measured their distances from the zero mark. The next diffraction was 300 lines/mm and the distance x was set to .150m. Once again we marked the beams and measured. We then set the diffraction grating to 600 lines/ mm and the distance x to .100m and did the same as before on the piece of paper. In activity two we used the same set up as in activity one but this time the diffraction grating was unknown. We marked the beams at different distances x and found that the unknown diffraction grating distance to be 0.150m.
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Unformatted text preview: In activity 3 we were trying to compare the diffraction grating of a CD as apposed to a DVD. Set up the laser beam to be pointed toward the readable side of the CD and placed a screen with a ruler attached and hole for the laser to go through and hit the CD. The same was set up for the DVD as well. The closer the spacing the more information that can be held on the disk and therefore a DVD wins that battle. In activity 4 we set up a lamp with a T opening and in front of that was a converging lens and in front of that was a diffraction grating and then the viewing screen with paper taped to it. We focused the T onto the paper and marked the center of the T or the zero-order. We then portrayed a rainbow array onto the viewing screen and found that the violet light was closest to the zero-order....
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