The image of a light source · Estonian PhO 2017 #2
Physics · optics
Problem
A concave lens and a convex lens have the same focal length with an absolute value f. The lenses are positioned so that their focuses and optical axes coincide. In front of the lenses on the optical axis there is a point light source A at a distance 1,5f from the convex lens. Find the location of the point light source's image formed by the two-lens system. Make a draft.