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36 Cards in this Set
- Front
- Back
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Optical Device
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Any device that uses light; for example, mirrors, lenses, microscopes, and telescopes.
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Microscopes
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Optical device used for viewing vary small objects.
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Telescope
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Optical device used for viewing distance objects.
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Refracting Telescope |
Telescope that uses two lenses to form and enlarge image.
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Reflecting Telescope
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Telescope that uses a curved mirror and a lenses to from and enlarge image.
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Binoculars |
Device for viewing distant objects; made up of two short refracting telescopes fitted together.
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Ray diagrams
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Diagram used to represent how light travels; each ray has an arrow to show the direction of travel.
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Intensity
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Brightness of light; amount of light arriving per unit area at a place.
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Transparent
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Describes materials that allow light to pass through with little or no reflection.
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Translucent
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Describes material that allow some light to pass through but not all.
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Opaque
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Describe light that doesn't allow to passs
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non Luminous
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Describes objects that do not produce light but may reflect it (example the moon) most objects on earth are non luminous.
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Luminous
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Describes objects that produce light; for example, the sun, light bulb, fire etc.
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Regular Reflection
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Reflection that happens when parallel rays hit a smooth surface: all rays reflect at the same angle.
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Diffuse reflection
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Reflection that happens when parallel rays hit a smooth surface: all rays reflect at different angles.
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Incident rays
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Ray of light that arrives at a mirror or other substance.
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Plane mirrors
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Flat mirror: reflecting surface that has no curvature.
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Normal
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Line perpendicular to a surface ( that is, forms a 90o angle with the surface.
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Angle of reflection
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Angle between the reflected ray and the normal.
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Angle of incidence
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Angle between the incidence ray and the normal
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Law of reflection
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Angle of incidence of a wave hitting a surface equals the angle of reflection.
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Focal point
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Point at which light rays meet, or appear to meet, after being reflected by a mirror, or refracted by a lens.
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Concave mirror
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Reflecting surface that is curved inward like the inside of a bowl or a spoon: light rays reflected from it converge or come together.
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Convex mirror
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Reflecting surface that that bulges out like the back of a spoon: light rays reflected from it diverge or spread out.
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Refraction
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lens
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concave lenses
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Piece of transparent material that is thinner in the middle that at the edges: light rays passing through it diverge or spread out
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convex lens
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Piece of transparent material that is thicker in the middle than at the edges; light rays passing through in converge or come together.
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real image
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Wave model of light
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Visible light spectrum
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electromagnetic radiation
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Electromagnetic spectrum
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Radar
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Incandescent
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florescent
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