Consider two thin lenses, one of focal length f1 and the other of focal length f2, placed in contact with each other as shown in figure. Apply the thin-lens equation to each of these lenses and combine the results to show that this combination of lenses behaves like a thin lens having a focal length f given by 1/f = 1/f1 + 1/f2. Assume that the thicknesses of the lenses can be ignored in comparison to the other distancesinvolved.

Transcribed Image Text:

K f₂