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Optics > Light > Flashcards

Light Flashcards

0
Q

transparent

A

objects transmit all or almost all incident light

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1
Q

geometric optics

A

the use of light rays to determine the path of light when it strikes an object; light can be reflected, transmitted, or absorbed, depending on the object

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2
Q

translucent

A

objects transmit some incident light, and either absorb or reflect the rest

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3
Q

opaque

A

when material does not transmit any incident light; all incident light is either absorbed or reflected; objects behind the material cannot be seen at all

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4
Q

medium

A

any physical substance through which energy can be transferred

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5
Q

radiation

A

a method of energy transfer that does not require a medium; the energy travels at the speed of light

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6
Q

electromagnetic wave

A

a wave that has both electric and magnetic parts, does not require a medium, and travels at the speed of light

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7
Q

visible light

A

electromagnetic waves that the human eye can detect

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8
Q

electromagnetic spectrum

A

the classification of electromagnetic waves by energy

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9
Q

visible spectrum

A

the continuous sequence of colours that make up white light

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10
Q

luminous

A

produces its own light

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11
Q

non-luminous

A

does not produce its own light

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12
Q

incandescence

A

the production of light as a result of high temperature

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13
Q

electric discharge

A

the process of producing light by passing an electric current through a gas

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14
Q

phosphorescence

A

process of producing light by the absorption of ultraviolet light resulting in the emission of visible light over an extended period of time
(glow in the dark stickers)

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15
Q

fluorescence

A

the immediate emission of visible light as a result of the absorption of ultraviolet light

16
Q

chemiluminescence

A

the direct production of light as a result of a chemical reaction with little or no heat produced

17
Q

bioluminescence

A

production of light in living organisms as the result of a chemical reaction with little or no heat produced

18
Q

triboluminescence

A

the production of light from friction as a result of scratching, crushing, or rubbing certain crystals

19
Q

light-emitting diode (LED)

A

light produced as a result of an electric current flowing in semiconductors

20
Q

semiconductors

A

a material that allows an electric current to flow in only one direction

21
Q

light ray

A

line on a diagram representing the direction and path that light is travelling

22
Q

image

A

reproduction of an object through the use of light

23
Q

mirror

A

any polished surface reflecting an image

24
Q

reflection

A

the bouncing back of light from a surface

25
Q

plane

A

flat

26
Q

incident ray

A

the incoming ray that strikes a surface

27
Q

reflected ray

A

the ray that bounces off a reflective surface

29
Q

perpendicular

A

at right angles

30
Q

angle of incidence

A

the angle between the incident ray and the normal

31
Q

angle of reflection

A

the angle between the reflected ray and the normal

32
Q

laws of reflection

A
  1. the angle of incidence equals the angle of reflection

2. the incident ray, the reflected ray, and the normal all lie in the same plane

33
Q

specular reflection

A

reflection of light off a smooth surface

34
Q

diffuse reflection

A

reflection of light off an irregular or dull surface

35
Q

virtual image

A

an image formed by light coming from an apparent light source; light is not arriving at or coming from the actual image location

36
Q

SALT

A

size, attitude, location, type

43
Q

normal

A

the perpendicular line to a mirror surface

Optics (4 decks)

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