3.7: Converging Lenses

Question 1

Converging Lenses

Answer 1

bring parallel light rays toward a common point

Question 2

When rays are parallel to principal axis?

Answer 2

will intersect at point F and because of direction of normals, rays continue to diverge

Question 3

How does Index of refraction and curve impact position of focal point?

Answer 3

• Lenses with higher indices of refraction bend light rays more, making the focal point closer to the lens
• Lenses with a larger curvature, but same index of refraction cause light rays to bend more

Question 4

Rules to Locate images in Converging Lenses

Answer 4

1. rays parallel to p-axis = leave through focal
2. ray that enters lens through focal = leave lens parallel to p-axis
3. ray that passes through origin of lens = leave in same direction