GCSE level optics questions
Q9. A student investigated how the nature of the image depends on the position of the object in front of a large converging lens. The diagram shows one position for the object.
(a) Use a ruler to complete a ray diagram to show how the image of the object is formed.
Award marks as follows:
- Ray through pole of lens is undiverted.
- Ray parallel to the principal axis passes through the principal focus after refraction by the lens.
- Image point should be joined by a perpendicular line to the principal axis with an arrow head on the top of it.
(4 marks)
(b) Describe the nature of this image relative to the object.
It is inverted, magnified and real (3 max)
(2 marks)
(Total 6 marks)