Question

1. Determine the focal length of a concave lens using a convex lens,​

Answer 1

Explanation:

You can calculate the focal length (F) of combination of lenses using the formula F = uv/(u+v). The focal length of convex lens (f1) is shown inside the simulator window. You can calculate the focal length of the concave lens using the formula f2 = (f1F/(f1-F).