1) 2020 S4 EOY P1 Q13

An object was placed 15.0 cm in front of a thin convex lens. The sharp image produced was magnified and upright.

What must be true about the focal length of the lens?

2) A photocopy machine uses a converging lens to focus images for printing on paper. If the focal length of the lens is 5.0 cm, what is the distance from the original copy to the lens during photocopying?

3) Ray X travels in the direction shown and passes through a lens.

Which ray correctly shows ray X emerging from the lens?

4) The diagram below shows object O, the image I formed from the light passing through lens L.

Which distance is the object distance?

5) An object is placed in front of a convex lens. The image that is formed on the opposite side of the lens to the object is always