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Theoretical Optics > optics & its branches, nature characteristics and propagation of light > Flashcards

optics & its branches, nature characteristics and propagation of light Flashcards

1
Q

the study of light as rays

A

Geometrical optics

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2
Q

also known as ray optics

A

Geometrical Optics

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3
Q

it deals with the formation of images by light rays acted on by lenses, prisms and mirrors

A

Geometrical Optics

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4
Q

it treats light as a collection of rays that travel in straight line

A

Geometrical optics

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5
Q

Study of light as waves

A

Physical Optics

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6
Q

also known as wave optics

A

Physical optics

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7
Q

it deals with diffraction, interference and polarization

A

Physical Optics

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8
Q

the study of light as particles

A

Quantum optics

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9
Q

it deals with the interaction of light and matter

A

Quantum optics

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10
Q

also known as photon optics

A

Quantum optics

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11
Q

it is the emission or transformation of energy in the form of waves or particles through space or through an optical medium

A

RADIATION

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12
Q

these are objects or bodies which generate their own light

A

Luminous objects or bodies

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13
Q
  • He measured the speed of light when he and an assistant carrying each lamp, stood on a different hilltops with a known distance between them.
  • With his pulse as a timer concluded that the speed of light was too fast to be measured by this method
A

Galileo

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14
Q

He predicted that the speed of light is finite by observing the Jupiter’s nearest moon

A

Ole Christensen Rømer

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15
Q

the first man to measure the speed of light through land experiment known as toothed wheel experiment

A

Armand Hippolyte Louis Fizeau

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16
Q

he measured the speed of light in a laboratory using a light source, a rapidly rotating mirror and a stationary mirror.

A

Jean Foucault

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17
Q

This light is found between the visible and x-ray spectrums

A

Ultraviolet

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18
Q

wavelength of UV-A

A

400 - 315 nm

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19
Q

wavelength of UV-B

A

315 - 280 nm

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20
Q

wavelength of UV-C

A

280 - 100 nm

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21
Q

what does HEV stands for?

A

High energy Visible light

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22
Q

wavelength of HEV

A

380 - 530 nm

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23
Q

is a high-frequency, high-energy light in the visible spectrum, which has a number of biological effects, including those on the eye.

A

High Energy Visible Light

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24
Q

it is an electromagnetic radiation with longer wavelengths than those of visible light, and is therefore generally invisible to the human eye

A

Infrared

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25
Q

Light of single wavelength

A

monochromatic

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26
Q

the splitting of white light into its component colors

A

Dispersion

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27
Q

visible light that is refracted the most

A

Violet

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28
Q

visible light that is refracted the least

A

Red

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29
Q

LASER stands for?

A

Light Amplification by the Stimulated Emission of Radiation

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30
Q

LED stands for?

A

Light Emitting Diode

31
Q

White light or Laser Light?

Polychromatic

A

White light

32
Q

White light or Laser Light?

not collimated

A

White light

33
Q

White light or Laser Light?

multi directional

A

White light

34
Q

White light or Laser Light?

monochromatic

35
Q

White light or Laser Light?

collimated

36
Q

White light or Laser Light?

Unidirectional

37
Q

The more polished the material is, the greater the ______.

A

Reflection

38
Q

The conversion of light energy into heat

A

Absorption

39
Q

it will occur to majority of light if series of lenses will be placed in front of a patient’s eye

A

Refraction

40
Q

said that “Visible objects are sources of light”

A

Phytagoras

41
Q

said that “the eye is the source of light”

A

Empedocles (fifth century BC)

42
Q

the downward motion of wave

43
Q

the distance from the equilibrium position

A

Displacement

44
Q

the maximum displacement of the vibration of the wave

45
Q

the distance traveled by light as it goes through one complete vibration

A

Wavelength

46
Q

the completion of a regular periodic event of a wave

47
Q

the number of complete waves generated by the source in one second

48
Q

the time required by the particle in the medium to complete one cycle of one vibration

49
Q

the rate or speed at which the wave travels in a give period of time

50
Q

the unit of frequency

51
Q

Constructive interference produces a _____.

A

SUPER TROUGH

52
Q

The interference of a crest with a trough produces _______ interference.

A

Destructive

53
Q

cancellation of reflection in ophthalmic lenses is due to ______ interference.

A

Destructive

54
Q

colors produced by anti-reflective coatings of lenses is due to _____ interference.

A

destructive

55
Q

Standing waves can produce ____ of waves.

A

Interference

56
Q

he proved the wave nature of light with a double slit diffraction experiment

A

THOMAS YOUNG

57
Q

Light rays which spread apart as if originating from a point source

A

Divergent light rays

58
Q

Light rays coming from near objects are _____.

A

Divergent light rays

59
Q

Collection of divergent, convergent or parallel pencil arising from an extended source

60
Q

the general term in which the convergence or divergence of light may be expressed

61
Q

Parallel pencils have _____ vergence.

62
Q

A pencil of light with positive vergence

A

Convergent Pencil

63
Q

Optical _____ is considered 20 feet or greater.

64
Q
  • is a disturbance that travels in a hypothetical medium called ether.
65
Q
  • wave whose particles of the medium vibrate at right angle to the direction in which the wave travels
A

TRANSVERSE WAVE

66
Q
  • are transverse waves in which the direction of vibration is at right angles to the direction of propagation.
A

WAVE MOTION

67
Q
  • Longest wavelength EM waves
  • Uses:
    • TV broadcasting
    • AM and FM broadcast radio
    • Heart rate monitors
    • Cell phone communication
A

RADIO WAVES

68
Q
  • Wavelengths from 1 mm- 1 m
  • Uses:
    • Bluetooth headsets
    • Broadband Wireless Internet
    • Radar
    • GPS
69
Q
  • Wavelengths in between microwaves and visible light
  • Uses:
    • Night vision goggles
    • Remote controls
    • Heat-seeking missiles
70
Q
  • Shorter wavelengths than visible light
  • Uses:
    • Black lights
    • Sterilizing medical equipment
    • Water disinfection
    • Security images on moneyA
A

ULTRAVIOLET

71
Q
  • Extremely low risk for DNA damage
  • Can destroy Vitamin A in skin
72
Q
  • Can cause DNA damage, leading to skin cancer
  • Responsible for sunburn
A

UV B

&

UV C

73
Q
  • Tiny wavelength, high

energy waves

  • Uses:
    • Medical imaging
    • Airport security
    • Inspecting industrial welds
74
Q
  • Smallest wavelengths, highest energy EM waves
  • Uses
    • Food irradiation
    • Cancer treatment
    • Treating wood flooring
A

GAMMA RAYS

Theoretical Optics (5 decks)

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