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Light
Utilize ray diagrams to explain the concepts of normal, angle of incidence, and angle of reflection.
14
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140
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98
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90 min
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CambridgeIGCSECombined ScienceWaves
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Light outcomes14 objectives
- Utilize ray diagrams to explain the concepts of normal, angle of incidence, and angle of reflection.
- Explain how a vertical plane mirror forms an optical image and describe its characteristics in relation to the object, such as being the same size, equidistant from the mirror, and laterally inverted.
- State that the angle of incidence equals the angle of reflection and recall this relationship for reflection.
- Describe how an optical image is formed by a plane mirror and clarify why this image is considered virtual.
- Employ simple diagrams, measurements, and calculations to analyze reflection using plane mirrors.
- Define refraction as the change in direction of a light ray when it transitions from one medium to another.
- Define and apply the terms normal, angle of incidence, and angle of refraction with the aid of ray diagrams.
- Describe how light travels through a transparent material, focusing on the boundaries between two media.
- Explain the effect of a thin converging lens on a parallel beam of light, noting that light rays from a distant object can be treated as parallel.
- Define and utilize the terms principal axis, principal focus (focal point), and focal length.
- Interpret ray diagrams to understand how a thin converging lens forms a real image.
- Describe the characteristics of an image using terms such as enlarged, same size, diminished, upright, and inverted.
- Explain the dispersion of light as demonstrated by the refraction of white light through a glass prism.
- Identify the seven colors of the visible spectrum (red, orange, yellow, green, blue, indigo, violet) in order of frequency and wavelength.
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