PHYS.8.G

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The student is expected to describe and predict image formation as a consequence of reflection from a plane mirror and refraction through a thin convex lens.
1666 TEKS header image

Knowledge and Skills Statement

Science concepts. The student knows the characteristics and behavior of waves.

a converging lens having at least one surface that curves outward like the exterior of a sphere, causing light to refract towards a focal point

a flat mirror that reflects light and produces a virtual image without the complication caused by an inward or outward curve

a phenomenon that occurs when a wave is bounced off the boundary of a new medium and not absorbed

a phenomenon that occurs when a wave changes direction due to the change in speed when it enters a new medium at an angle; the wave still moves in a straight line, but the angle changes

a disturbance or variation that transfers energy progressively from point to point with or without a medium, without transferring matter

Research

John, M., J. M. Molepo, and M. Chirwa."Learners’ Conceptual Understanding About Image Formation By a Convex Lens: How and to What Extent Can It Be Improved?" International Journal for Cross-disciplinary Subjects in Education 9, no. 2 (2018): 3384–3392. https://doi.org/10.20533/ijcdse.2042.6364.2018.0453

Summary:  The research conducted for this paper evaluates the effectiveness of an interactive optics teaching module, designed to enhance conceptual understanding by adopting a quasi-experimental pre-test-post-test design. The findings suggest that the practical experiment, supported by carefully-designed worksheets, worked significantly better than the computer simulation in improving learners' conceptual understanding of image formation by lenses.