Two Lenses
Part of the Optics, Waves and Modern Physics section of Coddy's Physics journey. Lesson 15 of 53.
Work one lens at a time: the first image is the second object.
u₂ = d − v₁, then the lens equation for the second lens.
The total magnification is the product: (v₁/u₁)(v₂/u₂).
Challenge
A lens with f₁ = 10 cm has an object 15 cm in front of it. A second lens with f₂ = 5 cm is 40 cm behind the first. Where is the final image: how far v_2 behind the second lens?
Try it yourself
Test yourselfThis lesson includes a short quiz. Start the lesson to answer it and track your progress.
All lessons in Optics, Waves and Modern Physics
1Reflection and Refraction
Reflection of LightThe Refractive IndexSnell's LawTotal Internal ReflectionDispersionApparent DepthRecap - Optical Fiber4Mechanical Waves
What a Wave IsTwo Graphs of a WaveWhen Pulses MeetInterferenceStanding WavesHarmonicsRecap - Guitar String