Wave Effects_edited (1)

.pdf

School

Hartnell College *

*We aren’t endorsed by this school

Course

Subject

Physics

Date

Dec 6, 2023

Type

pdf

Pages

Uploaded by JusticeWaterZebra28

Physics Experiment: Light as a Wave Name: Date: Part 1: Diffraction 1) Go to: https://phet.colorado.edu/en/simulations/wave-interference 2) Roll over “SIMULATIONS and click on “Physics” 3) Scroll down to “Waves Interference” and click on it. 4) Click on: 5) Click on: 6) Get familiar with all the controls, make changes, interact with the simulation. 7) Now that you are familiar with the simulation, select the box ; adjust the width and height so you get a tall, narrow opening 8) Select a wavelength near one end of the color spectrum – you choose and then turn on the light 12) Describe the diffraction pattern that appears: 9) Describe the diffraction pattern that appears: 10) How is the diffraction pattern oriented, relative to the opening? There is a rectangle in the center and there are 4 smaller versions of the rectangle to the left and right of the rectangle. As the smaller rectangles get further from the center rectangle they start fading. 11) Now make the opening short and wide. I picked purple The diffraction pattern is the same shape as the opening but is rotated horizontally and has rounded edges. The diffraction pattern is now a vertical rectangle with smaller rectangles on the top and bottom of the rectangle in the middle. Again, as the smaller rectangles get further from the center rectangle, they start fading.

13) How is the diffraction pattern oriented, relative to the opening? 14) Now max out the width and height of the opening 15) Describe the diffraction pattern that appears: 16) How is the diffraction pattern oriented, relative to the opening? 17) Now minimize the width and height of the opening. 18) Describe the diffraction pattern that appears: 19) How is the diffraction pattern oriented, relative to the opening? 20) Now, change the wavelength to the other side of the spectrum. For example, if you chose the red end of the spectrum for the previous steps, move the wavelength slider to the blue end of the spectrum. 21) Describe the diffraction pattern that appears: 22) How is the diffraction pattern oriented, relative to the opening? 23) How does this diffraction pattern compare to the diffraction pattern of the previous color? 24) Now max out the width and height of the opening 25) Describe the diffraction pattern that appears: 26) How is the diffraction pattern oriented, relative to the opening? 27) How does this diffraction pattern compare to the diffraction pattern of the previous color? 28) Now make the opening short and wide. 29) Describe the diffraction pattern that appears: 30) How is the diffraction pattern oriented, relative to the opening? The diffraction pattern is vertical and the same shape as the opening but with round edges. There is a square with soft edges and has smaller squares on each side (left, right, top, and bottom) The diffraction patter is smaller than the opening and looks to be positioned just like the opening. There is a big square with soft edges and smaller squares surrounding each side, slowly fading as they get further from the big square. The diffraction pattern is positioned like the opening and is bigger. Since I picked purple in the previous steps, I now switched to red. The red diffraction pattern is bigger than purple. The diffraction pattern is still the same shape as the opening, but is way bigger This diffraction pattern is bigger compared to the diffraction pattern of purple. There is a square and has smaller squares on each side The diffraction pattern is smaller than the opening but the same shape as the opening with softer edges. Just like before, this diffraction pattern is just a bigger version of the previous pattern There is a vertical rectangle with rounded edges and has 2 smaller versions of it on both top and bottom The diffraction pattern is the same shape as the opening but is rotated vertically.

31) How does this diffraction pattern compare to the diffraction pattern of the previous color? 32) Now make the opening tall and narrow. 33) Describe the diffraction pattern that appears: 34) How is the diffraction pattern oriented, relative to the opening? 35) How does this diffraction pattern compare to the diffraction pattern of the previous color? 36) Explain how this shows light behaves like a wave. 37) Get a screenshot or picture of your setup. The diffraction pattern is a bigger scale of the previous diffraction pattern. There is a horizontal rectangle with a smaller rectangle on the left and right. The diffraction pattern is the same shape as the opening but with rounder edges and is rotated horizontally. Just like before, it is a bigger version of the purple diffraction pattern. Different lights have different wavelengths

Part 2: Interference 1) Down at the bottom, select 2) Select light 3) Set Amplitude in the middle 4) Turn on: a. Screen b. Intensity 5) Pick a color with the frequency slider and write the color you chose. 6) Turn on only one of the lights . 7) Describe how you can determine the wavelength of the color of light you chose using any or all of the tools and controls in the simulation. 8) Now go figure out the wavelength of the light you chose and write it here________. Be sure 9) Calculate the frequency of the color of light you chose (you may need to check your notes or the textbook to find an equation to use). Write the frequency of the color you chose, here here________. Be sure and put correct units on it! 10) If you changed the Amplitude, set it back to the middle and describe the intensity chart. 11) Now, max out the Amplitude. How did the intensity chart change? 12) Pick a new color with the Frequency slider. After letting the waves propagate across, describe how the intensity chart compares to the previous color. BLUE and put correct units on it! You can determine the wavelength of the color by using the graph and measuring from one wave to the next. 432.9nm 693*10^8 The intensity chart is less than 1/4 away from the start of the chart The intensity chart is now about 1/4 of the way in the chart and is wavy. With a new color the the intensity chart is similar to the previous color

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version