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23 Cards in this Set
- Front
- Back
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hyperopia
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the inability of the eye to focus light from near objects
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presbyopia
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a form of far sightedness caused by a loss of accommodation as a person ages
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myopia
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the inability of the eye to focus light from distant objects (near sightedness)
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positive meniscus
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a modified form of the converging lens shape
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negative meniscus
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modified form of the diverging lens shape
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cone cells
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specialized cells found in the retina of the eye which detect colour
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critical angle
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angle of incidence giving an angle reflection 90 to normal
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vertex
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the point where the principle axis meets the mirror
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SALT
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Size, Attitude, Location, Type
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specular reflection
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smooth surfaces
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diffuse reflection
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rough surfaces
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law of reflection
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the angle of incidence equals the angle of reflection
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light
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the energy in the electromagnetic spectrum that we are able to see
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sun
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emits light when nuclear fusion excites atoms
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incandescent light bulb
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emit light when high temperature substances glow
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electric discharge
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excites gas/vapor molecules which emit light
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fluorescent light
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contains mercury, which when excited by electricity, emits UV light. A phosphor coating glows when it absorbs UV
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Phoshorescence
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glow in the dark when charged with high light energy
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chemiluminescence
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light sticks produced by chemiluminescence as a result of two chemicals mixing
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Bioluminescent light
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occurs in living organisms
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tribolominescence
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the production of light when certain crystals are scratched, crushed, or rubbed
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LED
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Light Emitting Diode. An electrical current to flow in only one direction
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Laser
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Light Amplified by simulated emission by radiation
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