Lab 8 Properties of Light (Online students)

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Albany State University *

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1001L

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Physics

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Dec 6, 2023

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docx

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4

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Name ____________________ Lab 8: Properties of Light Part I Lens Got to the following website and select l ens . https://phet.colorado.edu/sims/html/geometric-optics-basics/latest/geometric-optics- basics_all.html 1. A lens is _______________ (transparent, translucent, or opaque). 2. A lens ________________ (reflects or refracts) light. 3. How does the image size of the pencil compare to the real pencil? 4. Is the image upright or upside down? 5. What is the shape of the lens (concave or convex)? 6. Does this type of lens converge or diverge rays of light? Part II Mirror Got to the following website and select mirror . https://phet.colorado.edu/sims/html/geometric-optics-basics/latest/geometric-optics- basics_all.html 7. A mirror is _______________ (transparent, translucent, or opaque). 8. A mirror ______________ (reflects or refracts) light. 9. How does the image size of the pencil compare to the real pencil? 10. Is the image upright or upside down? 11. Look at yourself in a mirror. Hold up your right hand. Which hand of your image is raised? _______________________ *You are experiencing a very important property of plane (flat) mirrors.
Part III Reflection When waves hit a surface, they can be reflected. Using the simulation to answer the questions below. phet.colorado.edu/sims/html/bending-light/latest/bending- light_en.html *Select Intro Click the red button to turn the laser on. The laser can be moved from side to side. 12. What is the relationship between the angles of incidence and reflection? 13. What do you notice about the strength of the reflected beam? 14. Does changing the index of refraction (n) affect the angle of the reflected ray? 15. Change the top material from air to water. What happens? Part IV Prism On the Prisms page of the simulation phet.colorado.edu/sims/html/bending-light/ latest/bending-light_en.html Select the white on black color scheme. Set up the triangular block as shown. Ensure the ray is pointed near the tip. Angle of reflection Angle of incidence Normal line
16. Describe what you see. 17. A prism is ________________ (transparent, translucent, or opaque) and _______________ (reflects or refracts) light. Part V More Tools Open the link and select More Tools . phet.colorado.edu/sims/html/bending-light/ latest/bending-light_en.html Use the spectrum to investigate how color changes with wavelength. 18. Complete the table. Wavelength nm 400 440 460 525 580 610 700 Color Yellow 19. Describe the relationship between color and wavelength.
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Part VI Rainbows (Extension) Click on the Prisms part of simulation phet.colorado.edu/sims/html/bending- light/ latest/bending-light_en.html *Turn on reflections and use a circular prism. *See if you can produce a spectrum . 20. In a rainstorm, masses of small spherical droplets fall from the clouds and act as a(n) _______________ producing a rainbow. Part VII Why is an orange, orange? 21. What colors are reflected by an orange? 22. What colors are absorbed by an orange?