3.2.3. Thin lenses
A subsection of Physics, 0625, through 3. Waves
Listing 10 of 183 questions
shows a converging lens and the image I formed when an object is placed to the left of the lens. The principal focuses are labelled A and B and the centre of the lens is labelled C. On , draw two rays to locate the position of the object. Draw the object and label it O. A C B I lens Ring all of the following distances that are equal to the focal length of the lens. AB AC CB 2AB shows green light passing through a triangular glass block. Red light enters the triangular glass block shown in along the same path as the green light. On , draw the path of the red light within the triangular glass block. shows green light passing through a rectangular glass block. Red light enters the rectangular glass block shown in along the same path as the green light. On : draw the path of the red light within the rectangular glass block draw the path of the red light after leaving the rectangular glass block.
0625_m20_qp_42
THEORY
2020
Paper 4, Variant 2
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represents an object placed close to a thin converging lens. The scale for the grid is shown. object focal point focal point 5 cm 5 cm Determine the focal length of the converging lens. Use the information in . focal length = cm On , determine the position of the image formed by the lens, by continuing the path of each ray beyond the lens. Use an arrow to indicate the position of the image. shows the regions of the electromagnetic spectrum. radio waves microwaves infrared light visible light ultraviolet light gamma rays In , one region is unlabelled. State the name of the unlabelled region. Describe one use of ultraviolet light. Describe one harmful effect on people due to excessive exposure to ultraviolet light.
0625_m24_qp_32
THEORY
2024
Paper 3, Variant 2
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What is meant by the focal length of a converging lens? An object is placed in front of a converging lens. A real image is formed, as shown in . The converging lens is not shown. A object image B Explain what is meant by a real image. Rays of light from point A on the object form point B on the image. On , draw 1. a ray to find the position of the converging lens, showing the lens as a vertical straight line in this position, 2. a ray to find the position of a principal focus of the lens, marking this position F, 3. a third possible ray from A to B. The distance between the object and the lens is increased. State any changes which take place in 1. the distance of the image from the lens, 2. the size of the image.
0625_s11_qp_32
THEORY
2011
Paper 3, Variant 2
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What is meant by the focal length of a converging lens? An object is placed in front of a converging lens. A real image is formed, as shown in . The converging lens is not shown. A object image B Explain what is meant by a real image. Rays of light from point A on the object form point B on the image. On , draw 1. a ray to find the position of the converging lens, showing the lens as a vertical straight line in this position, 2. a ray to find the position of a principal focus of the lens, marking this position F, 3. a third possible ray from A to B. The distance between the object and the lens is increased. State any changes which take place in 1. the distance of the image from the lens, 2. the size of the image.
0625_s11_qp_33
THEORY
2011
Paper 3, Variant 3
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Questions Discovered
183