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Definition
| the change in direction of a light ray when it bounces off a surface |
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Definition
| the substance through which light travels |
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Definition
| a straight line with an arrowhead that shows the direction in which light waves are travelling |
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Definition
| a ray of light that travels from a light source towards a surface |
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Definition
| the angle between the incident ray and the normal in a ray diagram |
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Definition
| a line that is perpendicular to a surface where a ray of light meets the surface. |
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Definition
| a ray that begins at the point where the incident ray and the normal meet. |
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Definition
| the angle between the reflected ray and the normal in a ray diagram |
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Definition
| a mirror with a reflective surface |
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Definition
| an image formed by rays that appear to be coming from a certain position, but are not actually coming from this position; image does not form a visible projection on a screen. |
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Definition
| a mirror whose reflecting surface curves inward |
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Definition
| on a concave mirror, the line that passes through the centre of curvature, C, of the mirror and is normal to the centre of the mirror. |
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Definition
| the point on the principal axis through which reflected rays pass when the incident rays parallel to and near the principal axis |
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Definition
| the distance between the vertex of a mirror and the focal length |
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Definition
| an image that is formed when reflected rays meet |
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Definition
| the change in size of an optically produced image |
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Definition
| irreguluarites in an image in a curved mirror that result when felected rays from the outer parts of the mirror do not go through the focal point |
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Definition
| a mirror whose reflected surface curves outward |
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Definition
| the bending of light as it travels, at an angle, from a material with one refractive index to a material with a different refractive index |
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Definition
| the ray that is bent upon entering a second meduim |
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Definition
| the angle between the normal and a refracted ray |
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Definition
| the ratio of the speed of light in a vacuum to the speed of light in a given meduim |
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Definition
| the process of seperating colours by refraction |
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Term
| Partial reflection and refraction |
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Definition
| a phenomenon in which some of light that is travelling from one meduim into another is reflected and some is refracted at the boundary between the media |
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Term
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Definition
| the angle og incidence that produces an angle of refraction of 90 degrees. |
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Term
| Total internal reflection |
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Definition
| the phenomenon in which incident light is not refracted but is entirely reflected back from the boundary; occurs when light travels from a meduim in which its speed is lower to a meduim in which its speed higher |
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