Focal Length of Lenses
PHY 201 & 231
Lab PDF 1Lab PDF 2
Based on Loyd #41. In this experiment, the students will use an optical bench and several lenses alone and in combination to form real and virtual images. The students will learn that converging lenses form real images and diverging lenses form virtual images. They will form a real image of a distant object with a converging lens and determine the focal length of that lens. The students will also measure the focal length of a diverging lens by using it with a converging lens to form a real image.
Equipment
| Name | Location | Quantity |
| Light Sources | JE-105A-D29, S135 | 1 per table |
| Holder, Lens | JE-105A-D34 | 2 per table |
| Object Screens | JE-105A-D23 | 1 per table |
| Clamp, Optics Bench | JE-105A-D30, D31 | 5 per table |
| Optics, Bench End Supports | JE-105A-D36 | 2 per table |
| Rods, Clip | JE-105A-D24 | 1 per table |
| Image Screens | JE-105A-D26, D35 | 1 per table |
| Optics Bench Rod | JE-105A (Next to File Cabinet) | 1 per table |
| Meter Stick - 1.00m | JE-105A-(105 Door), D98 | 1 per table |
| Ruler, SAFE-T | JE-105A-D90 | 2 per table |
| Tape, Masking | JE-105A-D71 | 1 per table |
| Protractor | JE-105A-D90 | 2 per table |
| Teaching Lenses, Black (Focal Length: -15cm) | JE-105A-D32 | 1 per room |
| Teaching Lenses, Green (Focal Length: 12.5cm) | JE-105A-D32 | 1 per room |
| Teaching Lenses, Red (Focal Length: 24.5cm) | JE-105A-D32 | 1 per room |
Notes
1.) Put out ONLY red, green and black lenses.
2.) Leave one extra light fixture in the back of the room.
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Item modified on 2009-08-03 16:17:32 by camaratam1.