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Physics: Heat & Energy > Light > Flashcards

Light Flashcards

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1
Q

Incandescent

A

Emits light when current passes through a filament

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2
Q

Fluorescent

A

Ultraviolet light emitted from plasma excites phosphors to produce light

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3
Q

LED

Light-emitting Diode

A

A small bulb containing a semiconductor that emits light when current is passed through it

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4
Q

Transparent

A

Allows light to pass

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5
Q

Translucent

A

Allows some light to pass and blocks other light

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6
Q

Opaque

A

Blocks all light

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7
Q

Umbra

A

Center of shadow, no light shining

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8
Q

Penumbra

A

Gray area around umbra, small amount of light shining

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9
Q

Prism

A

Glass that splits the colors of light

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10
Q

Retina

A

Back part of the eye

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11
Q

Rods

A

Special cells in the eye that detect light

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12
Q

Cones

A

Special cells in the eye that detect different colors

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13
Q

Reflection

A

Waves changing direction when it bounces off a surface that does not absorb it

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14
Q

Angle of incidence

A

Angles at which light approaches an object

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15
Q

Angle of Reflection

A

Angle at which light reflects off of an object

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16
Q

Plane mirror

A

Flat Mirror

17
Q

Virtual Image

A

Reflected image

18
Q

Concave Mirror

A

Surface is curved away from the imcoming light

19
Q

Convex Mirror

A

Surface is curved toward the incoming light

20
Q

Refraction

A

Bending of light

21
Q

Mirage

A

Image of the sky projected above the ground because of different densities of air

22
Q

Concave Lens

A

Surfaces curve toward center of the lens

23
Q

Convex Lens or Diverging Lens

A

Surfaces curve outward away form the center of the lens

24
Q

Focal Point or Principal Focus

A

Point at which light rays converge

25
Q

Focal Length

A

Distance from lens to focal point

Physics: Heat & Energy (6 decks)

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