Two-lens system: image, magnification and equivalent focal length
Place two thin lenses (convex or concave) a distance d apart; trace the image through both and find 1/F = 1/f1 + 1/f2 - d/f1f2.
About this experiment
| Subject | Physics |
|---|---|
| Class | 12 |
| Chapter | 9. Ray Optics and Optical Instruments |
| NCERT section | 9.6 |
| Level | Advanced (JEE / Olympiad) |
| Time | about 14 minutes |
| Access | Included in a PractiSci plan |
What you do in the lab
Change the controls and watch the physics behave in real time in 3D. Live readouts and graphs show the numbers behind it, and the Learn tab has the theory, procedure, observations and viva questions. Works on a phone or a laptop, in English and Hindi.
Topics: lens combination · two lenses · equivalent focal length · magnification
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