6A60.31 - Thin Lenses - Image Formation - Arrow Projector

Code Number:
6A60.31
Demo Title:
Thin Lenses - Image Formation - Arrow Projector
Condition:
Fair
Principle:
Lenses and Image Formation
Area of Study:
Optics
Equipment:
Optical Bench Lenses (Convex & Concave) (Assorted), Screen (White Cardboard), Light Source with Image, Meter Stick, and Parallel Ray Light Source (Slide Projector).
Procedure:

Arrange the apparatus as shown. With the lenses you can project the inverted light image onto the screen which may be seen with the camera focused on the screen. You may also remove the screen and project the image directly into the camera thus simulating the human eye. The meter stick is for measuring focal lengths. To measure the focal lengths accurately you will need a distant parallel light source. Bring the light rays to a point with a lens on the paper screen. The distance from the paper screen to the lens is the focal length.

References:
  • Hakan Isik, "Using a Smartphone Camera's Manual Focusing in Distant Optics Lessons to Learn Lens and Mirror Images", TPT, Vol. 62, #6, Sept. 2024, p. 501.
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  • Soumen Sarkar, Sanjoy Kumar Pal, Surajit Chakrabarti, "Determination of the Transverse Width and Distance of an Object with a Smartphone Camera", TPT, Vol. 61, #1, Jan. 2023, p. 58.
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  • Pietro Ferraro, "Optics with Balloons", TPT, Vol. 34, #5, May 1996, p. 274.
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  • John J. White III, "Ray Diagrams for a Virtual Object", TPT, Vol. 10, #1, Jan. 1972, p. 33.
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  • "O-300: Bulb Filament and Black Paper", DICK and RAE Physics Demo Notebook.
  • "O-315: Right-Left Inversion", DICK and RAE Physics Demo Notebook.
  • "O-320: Half Lens - Whole Image", DICK and RAE Physics Demo Notebook.
  • Robert Ehrlich, "10.4, Partially Blocking a Converging Lens", Why Toast Lands Jelly-Side Down, p. 161.
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  • Borislaw Bilash II and David Maiullo, "A Real Lens", A Demo a Day: A Year of Physics Demonstrations, p. 345.
  • Janice VanCleave, "Inverted", 200 Gooey, Slippery, Slimy, Weird, & Fun Experiments, p. 16.
  • Sara Stein, "Forming Images", The Science Book, p. 188.

Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.