Optics 2

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Michigan State University *

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252

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Electrical Engineering

Date

Apr 26, 2024

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pdf

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8

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Optics Lab 2 Group 12 Abbie Schraeger, Johnny Rioux, Zahreef Kazi, Jane Schell, Jacqueline Connelly
Goal The objective of this lab is to investigate the inference of light through both single and double-slit diffraction. The concept of light diffraction is essential in the world of science and everyday life. By experimenting, we were able to explore and understand the differences present in changing distance and its effect on light diffraction of the laser. The independent variable is the distance between the screen and the diffractor. The dependent variable is the length from the center to the second-order dot. The control variables are the wavelength and the slit width. In this lab, we are measuring how the distance affects the length of the laser that is being run through a diffractor. We are calculating y (the length of dark spots) from the equations below: 𝑦 = ?λ𝐷 𝑎 Experimental Setup Figure 1. Experimental setup for single-slit and double-slit diffraction
Figure 2. Experimental setup for Part 2. Plan of Approach Part 1: Single-slit Diffraction 1. Obtain materials ( white paper, ruler, beam stop, diffracting device, track, laser, viewing screen) 2. Place the diffracting device in front of the laser and set it to 0.04 mm slit width. 3. Decrease the distance between the diffracting device and the viewing screen by 10 cm each time 4. Measure the center of the dark spot to the 2nd order each time the distance is changed to obtain the values for y. It is important to note that our ‘m’ equals 2. 5. Plot the distance (cm) and dark spot distance (cm) in curve.fit to obtain a graphical representation of our data Part 2: Using Hair for Single Slit 1. Tape a strand of hair to the diffraction device and place it in front of the laser, 50 cm from the paper. 2. Measure the center of the dark spot to the first order to solve for ‘a’ Part 3: Double Slit Diffraction 1. Use the same setup shown above, but swap out the single-slit diffraction device for the double-slit diffraction device. 2. Repeat steps 2-5 in Part 1 for the double-slit diffraction device.
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