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Cards In This Set
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Luminous
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Something that produces light
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Incandescent
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When visible light is given off as a result of high temperatures, the light source is said to be...A flame from any burning source, an ordinary lightbulb, and the Sun are all incandescent sources because of high temperatures
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Blackbody radiation
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Visible light is emitted from incandescent sources at high temperatures, but actually electromagnetic radiation is given off from matter at any temperature. This radiation is called...
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When visible light is given off as a result of high temperatures, the light source is said to be
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Incandescent
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Light ray model
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Used to describe the travels of light
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Visible light is emitted from incandescent sources at high temperatures, but actually electromagnetic radiation is given off from matter at any temperature. This radiation is called...
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Blackbody radiation
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Higher frequency at higher temperatures.
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A ray of light travels in a straight line from a source until it encounters some object or particles of matter. What happens next depends on several factors, including (1) the smoothness of the surface, (2) the nature of the material, and (3) the angle at which the light ray strikes the surface.
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The smoothness of the surface of an object can range from perfectly smooth to extremely rough. If the surface is perfectly smooth, rays of light undergo reflection, leaving the surface parallel to one another. If a surface is not smooth, the light rays are reflected in many random directions as diffuse reflection takes place
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Opaque
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Materials that do not allow transmission of any light. These materials reflect light, absorb light, or do some combination of partly absorbing and partly reflecting light
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(A) Rays reflected from a perfectly smooth surface are parallel to one another. (B) Diffuse reflection from a rough surface causes rays to travel in many random directions.
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Virtual image
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A mirror image is formed where the rays of light appear to originate A virtual image is the result ofyour eyes' and brain's interpretations oflight rays, not actual light rays originating from an image.
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Real image
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Light rays that do originate from the other kind of image A real image is like the one displayed on a movie screen, with light originating from the image. A virtual image cannot be displayed on a screen, since it results from an interpretation.
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Law of reflection
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Angle of incidence equals the angle of reflection
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Refraction
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Change of direction of a light ray at the boundary (Note that θᵢ≠θᵣ in refraction, only in reflection)
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The law of reflection states that the angle of incidence is equal to the angle of reflection. Both angles are measured from the normal, a reference line drawn perpendicular to the surface at the point of reflection. in reflection, θᵢ=θᵣ
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