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Ocular anatomy > Unit 1 > Flashcards

Unit 1 Flashcards

1
Q

Christian Huygens (1629-1695)

A

Wave theory of light, lights waves. Mathematician

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2
Q

Sir Isaac Newton (1642-1726)

A

Corpuscular theory of light, light is emitted by tiny particles called corpuscles

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3
Q

James Clerk Maxwell (1831-1879)

A

Electromagnetic theory of light

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4
Q

Leon Foucault (1819-1868)

A

Made measurement that accurately measure the speed of light

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5
Q

Max Planck (1858-1947)

A

Planks constant, which defines the quantum energy of photons when their frequency is known, light travels as photons

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6
Q

Albert Einstein (1879-1955)

A

Theory of relativity

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7
Q

Wave theory of light

A

1) wavelength in nm
2) frequency (f) in unit Hertz (Hz)
3) Speed of light (v) = 3.00x10^8

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8
Q

Frequency

A

Frequency = speed/wavelength

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9
Q

Electromagnetic spectrum

A

Ordered
- gamma rays
-X-ray
-ultraviolet
-visible light
-infrared
-microwave
-radio waves (fm,am)
-long radio waves

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10
Q

Units of illuminamce

A

Lux(lx) — measurement of the intensity of light
— luck is one lumen per square meter area

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11
Q

Luminous flux

A

Quantity of energy of light emitted per second in all directions

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12
Q

Lumens

A

Unit

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13
Q

Luminous flux

A

Objective measure of the useful light emitted by a light source is often used as an objective measure. Typically reported on the packaging for light bulbs.

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14
Q

Foot candle

A

1 foot away, unit of illuminance equal to one lumen per square foot

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15
Q

Geometric Optics

A

1) branch of optics dealing with light rays
2) study of the effect of mirror and lenses on light rays

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16
Q

Conventions of light rays

A

1) travel form left to right
2) travel away from the source
3) can be acted upon by mirrors, lenses, prisms

17
Q

Reflection of light

A

How light reflects off surfaces

18
Q

Light rays — Diverging

A

Moving outward, minus power, concave

19
Q

Light rays — Converging

A

Coming to you, plus power, convex

20
Q

Parallel (zero vergence)

A

Light rays parallel to each other due to no vergence

21
Q

Images — real

A

On the left = real

22
Q

Virtual

A

On the right

23
Q

Type of image depends on

A
  • specific type of mirror
    -where the object is placed
24
Q

Concave mirrors (converging)

A

Real, inverted, smaller

25
Q

Convex mirror (diverging mirror)

A

Virtual, upright, smaller image

26
Q

Index of refraction

A

How much the path of light is bent or refracted. Light bends moving from less dense to more dense.

1.33

Ocular anatomy (1 decks)

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