3.2.3. Thin lenses
A subsection of Physics, 0625, through 3. Waves
Listing 10 of 183 questions
A periscope is an optical instrument containing two mirrors in a long tube. shows the path of a ray of light through a periscope, without the tube. mirror A mirror B normal normal On , 1. use the letter i to indicate clearly the angle of incidence of the ray striking mirror A, 2. use the letter r to indicate clearly the angle of reflection of the ray leaving mirror A. Write down the equation that links i and r. Suggest a use for the periscope. State what happens if mirror B is rotated through a small angle. shows a converging lens. The lens has one principal focus at F1 and the other principal focus at F2. F2 F1 principal axis Use your ruler to help you answer this question. On , clearly mark two distances that are each the focal length of the lens. On , draw a ray on the left side of the lens, which strikes the lens, above and parallel to the principal axis. Label this ray: ray 1. Continue this ray to show its path through the lens and at least 6 cm to the right of the lens. On , draw a ray that emerges from the lens, below and parallel to the principal axis. Label this ray: ray 2. Show clearly the path of this ray before it reached the lens.
0625_s14_qp_21
THEORY
2014
Paper 2, Variant 1
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represents an object O placed in front of a converging lens. P Q S R O I State a full description of the image I. Using the letters on , identify the focal length of the lens. On , draw an eye suitably placed to view the image I. shows an object O placed to the left of a converging lens. A principal focus of the lens is at the position marked F. F O On , draw two rays to locate the image of object O. Draw the image. On , draw one other ray from the upper tip of O to the image.
0625_s15_qp_31
THEORY
2015
Paper 3, Variant 1
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represents an object positioned on the principal axis of a thin lens. F F object principal axis Each small square of the grid represents 0.5 cm. Each principal focus of the lens is labelled F. Use the grid to determine the focal length of the lens. focal length = cm On , draw a ray from the top of the object that passes through a principal focus, then through the lens and beyond it. On , draw a second ray from the top of the object that passes through the centre of the lens. Continue the path of this ray to the edge of the grid. On , draw an arrow to show the position and nature of the image produced by the lens.
0625_s18_qp_32
THEORY
2018
Paper 3, Variant 2
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shows an incomplete ray diagram of a converging lens forming an image of the object, O. X lens O Y State the term given to the line XY. On , indicate the position of one principal focus of the lens. Label the principal focus, F. On , draw a ray of light from the top of the object that passes through the lens to form the image. Use a ruler. On , draw the image formed by the lens. Label the image I. Choose words from the box that describe the image formed by the lens in . diminished enlarged horizontal inverted same size upright Draw a ring around each correct word.
0625_s19_qp_33
THEORY
2019
Paper 3, Variant 3
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Questions Discovered
183