The newest 6 of 6 written questions. Open one to see it on the real paper.
Where is the object positioned, and is the image real or virtual?
See it on the paper →1-mark question — its maths and diagrams are best seen on the paper.
See it on the paper →State the name of the distance labelled X in Fig. 9.2.
See it on the paper →Lenses are often used in telescopes to help astronomers observe objects in space. Fig. 6.2 shows an incomplete ray diagram for two rays of light from an object entering a thin converging lens. F is the principal focus of the lens. ray 1 ray 2 F principal axis object lens Fig. 6.2 Complete Fig. 6.2 to show: • the path o...
See it on the paper →State the distance that the lens should be placed from the lamp. Give a reason for your answer. distance = cm reason
See it on the paper →On Fig. 6.2, draw two rays to show how the lamp produces a parallel beam of light.
See it on the paper →Some candidates gave a correct ray diagram, showing the diverging rays coming from the lamp. Candidates should be aware that the rays should be drawn with a ruler to give a straight line. The rays should also be continuous and not have parts missing as they pass through the lens. Arrows drawn on the rays should show the correct direction of travel.
— Examiner report, October/November 2023, 0653/33 Q9(a)(i) (Cambridge)
Very few candidates knew that the distance labelled X is the focal length, the distance from the centre of the lens to the point from which the rays diverge as shown in Fig. 9.2.
— Examiner report, October/November 2023, 0653/33 Q9(a)(ii) (Cambridge)
Very few candidates knew that ray 2 continues without deviation through the lens and beyond, and even fewer were able to draw the image inverted, between the intersection of the rays and the principal axis. A number of candidates made no attempt at this question.
— Examiner report, October/November 2021, 0653/33 Q6(e) (Cambridge)
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