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A Lighthouse of Lenses

Join the Acton-Boxboro Group as they present their final design for their lighthouse-themed exhibit exploring the history and science behind lenses. Discover the different aspects of the exhibit, issues faced, and the cooperation necessary to bring it to life. Get ready to explore the world of lenses and see them in action in a variety of exciting and educational ways. Don't miss this captivating presentation!

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A Lighthouse of Lenses

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  1. A Lighthouse of Lenses Acton-Boxboro Group: Helen, Caitlin, Joanna, Rashmi, Amy, Elizabeth, Maureen, and Laurie

  2. The Exciting Adventure of Our Presentation • Final Design • Why This? • How our exhibit works. • Different aspects of our exhibit. • Issues • Lenses around us • History behind lenses • Science Behind Exhibit • Cooperation

  3. Final Design • 4 ft x 4 ft space • Hexagonal box • 4 openings with combs • 1 opening to project slides • 1 opening for mixing colored light • 2 walls • Budget of $3,000, spent $531.05

  4. Why This? • First interested in cameras. • Focused on lenses and optics. • From that we compiled the idea for a light house.

  5. Enticing, and Inviting Ways to Use the Exhibit • Lenses on 4 sides • Concave • Convex • Prisms • Slides • Different Slides • Wall to project on • Sheet of fresnel lenses and a magnifying glass to flip image

  6. More Exciting and Educational Ways to Use Our Exhibit • Mixing different colored light • Theatrical Gels • Prisms • Screen

  7. The First Prototype • 4 sided figure • 3 comb sides and 1 slide side • Medium, small, large combs • Wanted to look like light house The Many Stages

  8. The Second Prototype • 3 sided figure • 2 comb sides(sliding combs) • 1 slide side • Vents on top • Dead space The Many Stages

  9. The Final Prototype • 6 sided figure • Final design • 4 comb sides • 1 slide side • 1 colored light mixing side • Inverted light bulb • Looked nice in the area The Many Stages

  10. Dark Light > Darkening Our Exhibit • Space too bright • First idea- cubicle wall • Final- wooden wall 5 ft tall

  11. HEAT Issues- • Using a 200 watt bulb. • Made the wood extremely hot. • To cool down: • Open at bottom • Fan at top to draw air out

  12. Where do You See Lenses Everyday? Glasses are made of two lenses. There are fresnel lenses inside a lighthouse to magnify the center light beam. Your eye is a convex lens.

  13. Lenses All Around Us There’s a fresnel lens inside an overhead projector. When you look through a camera you’re looking through a double convex lens. A magnifying glass is actually a large convex lens.

  14. Optical Instruments A refracting telescope has three convex lenses. The first brings the object into focus, but inverts it, the second enlarges it, and the third puts it back right side up. The parallel rays from stars are directed by the concave mirror to the diagonal mirror which reflects the light to the lens in the eyepiece in a reflecting telescope. There are 2 right angle prisms in a periscope which make the light bend 90 degrees directing the top view to the eye.

  15. History Behind Lenses • The first lenses were glass spheres filled with water and were used as burning glasses • They were made by the Greeks and Romans • True glass lenses weren’t made until the 13th century in England

  16. The Science Behind Flipping a Slide- Convex Lens • A magnifying glass is a convex lens • When the object is outside of the focal point (where the rays of light cross), the image will be upside down. • This happens with any convex lens, the rays of light converge and cross on the other side of the lens.

  17. The Concave Lens The Concave Lens • A concave lens bends in, meaning the middle is thinner than the outer edges. • A concave lens spreads out the rays of light • Its focal point (where the virtual image shows up) is on the same side as the source of light

  18. Prisms • Prisms come in different shapes • We have included a rectangle and triangle prism • Triangle prisms can create rainbows • Triangle prisms are great to direct light at drastic angles. • They have been used in our exhibit to cross the different colored light. • The degree of each angle is the degree the light is bent. Right angle prisms direct light 90 or 45 degrees and equilateral prisms direct it 60 degrees.

  19. The Principles of Mixing Colored Light blue green cyan WHITE magenta yellow red • PIGMENT • Primary colors-magenta, yellow, cyan (light secondary) • Secondary colors- green, blue, red (light primary) • LIGHT • The primary and secondary colors of light • All three colors make white light • Different amounts of red, green, and blue create different shades of color

  20. How Our Group Particapated • We all had lots of fun, but at times our ideas differed with each others’ or with our client. • This program turned out to be quite a team experience and we learned a lot about teamwork.

  21. Special Thanks To... • Louise- Without her we’d never be done • Janet- Kept us having fun • Haruna- Solves our problems (mmmm… cookies) • Peter- Turned us into celebrities • Geoff and Denise- Made us look like professionals • Laurie- Earthquake woman(and gave up her time for us) • Emily- Web page master • Bob-Turns on the power • Kathy Kelly- for helping us get here everyday

  22. THE ENDAny questions?

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