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Experiment 7: Mirrors and Lenses Part A: Concave Mirror Arrangement Object Distance (cm) Image Distance cm) Object Height (cm) Image Height (cm) Image Orientation Projected

Experiment 7: Mirrors and Lenses

Part A: Concave Mirror

Arrangement

Object Distance (cm)

Image Distance

cm)

Object Height (cm)Image Height (cm)

Image Orientation

Projected back to object distance

7.8 cm

7.8

N/A

N/A

Upside down

Projected back to 2x object distance

15.6

11.1

N/A

N/A

Upside down(flipped)

Part B : Converging Lens

Arrangement

Object Distance (cm)

Image Distance

cm)

Object Height (cm)

Image Height (cm)

Image Orientation

Image and object distance - the same

28.733.3N/AN/AUpside down

Object at 2x image distance

66.622.4

N/A

N/AUpside down

Reformed image after moving lens toward the object

20.168.9

N/A

N/AUpside down (larger)

Distance object

?18.1

N/A

N/AUpside down

Part C: Diverging Lens

ArrangementFocal Length

Diverging lens between converging lens and screen, image reflected off a mirror onto the plane of the object

74 - 50 = 24

CALCULATION AND ANALYSIS 1. Calculate the focal length of the concave mirror twice, using the data from the two rows of the data table for part A. 2. Calculate the magnification of the concave mirror for each object distance analyzed. 3. Calculate the focal length of the converging lens three times, using the data from the first three rows of the data table for part B. 4. Use the image distance for a distant object as the accepted value for the focal length of a converging lens. Calculate the % error for the focal lengths you obtained in step 3. 5. Report the focal length of the diverging lens.

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Mirror and Lens Equation dright. The magnification of the image is given by equation hi di m = = Magnification ho do goes actually have light passing through them focused by t

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