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PERSONAL REVIEWER > Optical Microscope > Flashcards

Optical Microscope Flashcards

1
Q

Used extensively to examine transparent minerals, fragments, grains and small crystals, as well as thin sections of minerals, rocks and other crystalline aggregates

A

Polarizing Microscope

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2
Q

useful in the determination of the optical properties of individual crystals or aggregates and in the interpretations of textures, structures, growth patterns, and various relationship of natural or artificial substance.

A

Polarizing Microscope

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3
Q

source of light of the microscope

A

Light source

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4
Q

Concentrates light

A

Collector lens system

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5
Q

controls light ray bundle at
the source field

A

Field iris diaphragm with
field iris diaphragm ring

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6
Q

used to polarize the light in one direction

A

Polarizer

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7
Q

It controls and illuminates light coming from the source field directed to the object field.

A

Condenser

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8
Q

controls cone of light catering the objective

A

Aperture Iris Diaphragm

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9
Q

It is useful for R. I. determination

A

Aperture Iris Diaphragm

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10
Q

platform for specimen

A

Stage

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11
Q

Fix specimen on stage

A

Stage Clips

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12
Q

Used for point locations and systematic traverse in a species along mutually perpendicular directions

A

Mechanical Stage

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13
Q

For Focusing Image (moving in cm)

A

Coarse Adjustment Knob

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14
Q

For Focusing Image (moving in mm)

A

Fine Adjustment Knob

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15
Q

holds objectives

A

Revolving Nosepiece

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16
Q

Essential lenses of microscope for magnification and resolution

A

Objectives initial

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17
Q

Magnifications of the Objectives initial

A

4x, 10x, 20x, 40x

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18
Q

used to **determine fast and slow directions (electric vectors) of light polarization **in crystals under view on the microscope stage by increasing or decreasing retardation of the light

A

Gypsum plate

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19
Q

cut to such thickness that it increases or decreases
retardation of a section by about 1/4λ (sodium light)

A

mica plate

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20
Q

ground to produce interference colors from the
beginning of the first to the end of the third or fourth order.

A

quartz wedge

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21
Q

quartz wedge equals to?

A

0.009

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22
Q

Beam of** light consists of a stream of minute particles, or photons,** given off at high velocity by a luminous body that travel through space in straight lines and eventually reach the eye.

A

Corpuscular Theory

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23
Q

light to be transmitted by the vibration of particle in the waves

A

Wave Theory

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24
Q

Magnifications of the Objectives initial

A

4x, 10x,20x, 40x

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25
Q

The phenomena of light such as reflection, refraction, diffraction and interference may be readily explained in accordance with this theory

A

Wave Theory

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26
Q

The (Dutch) scientist that advanced the Wave Theory

A

Christian Huygens

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27
Q

considers light as made up of waves but said that waves are electromagnetic

A

Electromagnetic Theory

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28
Q

He proposed the Electromagnetic Theory in 1873

A

James Clerk Maxwell

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29
Q

Assuming that radiating oscillators in a black body radiate energy discontinuously in units called quanta.

A

Quantum Theory

30
Q

He proposed the Quantum Theory

A

Planck / Max Planck

31
Q

The locus of all the points of a medium which receives light wave disturbance simultaneously so that all points are in the same phase.

A

Wave Front

32
Q

A perpendicular drawn to the surface of a wave front at any direction of propagation of light

A

Wave Normal

33
Q

Direction in which the light is propagated

A

Ray of Light

34
Q

It is alway perpendicular to wave front

A

Ray of Light

35
Q

A wave normal represents a _________________

A

Ray of Light

36
Q

The wave normal and direction of propagation of light rays are** perpendicular to the wave front.**

A

Isotropic

37
Q

The light rays are** not parallel to the wave front.**

A

Anisotropic

38
Q

May represent a curve combining movement around
a circle with motion along a straight line.

A

Displacement

39
Q

Lies in the wavefront and is perpendicular to the ray in isotropic media.

A

Vibration direction

40
Q

In ____________, Vibration direction is only perpendicular in limited directions.

A

anisotropic media

41
Q

Distance between two successive crests or troughs, or
any corresponding distance along the wave.

A

Wavelength

42
Q

Surface determined at a given instant by all parts of a system of waves traveling along the same direction and in the same phase.

A

Wavefront

43
Q

wavefront is perpendicular only in certain
directions in?

A

anisotropic

44
Q

Part of the microscope that we
move left to right.

based on discussion

A

Mechanical Stage

45
Q

the amount of space between the front of the objective and the top of the coverglass, when the specimen is in focus

definition is from google but it was discussed

A

Free working distance

46
Q

for insertion of microscopic
accessory plate

A

Test plate

47
Q

polarizes light

A

Analyzer

48
Q

for observing interference
figure

A

Bertrand lens

49
Q

Approximates daylight

note that they only use blue filter before bc the light is yellow

A

Filter mount with blue
filter

50
Q

Holds the eye piece

A

Observation tube

51
Q

essential lenses of microscope for magnification or resolution conform with objectives

A

Eyepieces with cross hair

52
Q

for focusing eyepieces

A

Diopter adjustment ring

53
Q

for camera attachment in
photomicrography

A

Photo Tube

54
Q

number of vibrations in a given unit of time.

A

Frequency

55
Q

maximum displacement of a wave from the line of transmission

A

Amplitude

56
Q

time interval necessary for a wave to undergo a complete oscillation

A

Period

57
Q

point of the wave with the maximum upward displacement

A

Crest

58
Q

point of the wave with the greatest downward displacement

A

Trough

59
Q

a group of light waves following along a sample path

A

Beam

60
Q

straight-line path followed by light in moving from one point to another

A

Ray

61
Q

equal to the ratio of the wave-normal velocity in a
vacuum to the wave-normal velocity in the medium whether isotropic or anisotrophic

A

Refractive index

62
Q

light of a single wavelength

A

Monochromatic light

63
Q

lies parallel to the plane of the wavefront.

A

Light vector

64
Q

In ____________ , Light Vector is perpendicular to the direction of the propagation

A

isotropic

65
Q

In ______________ , Light vector is still
parallel but not perpendicular to the direction of the propagation.

A

anisotropic

66
Q

2 Types of Vector

A
  1. electric
  2. magnetic
67
Q

measures the electrical displacement

A

electric

68
Q

measures the magnetic displacement or induction.

A

magnetic

69
Q

combination of all the different wavelengths visible to the eye

A

White light

70
Q

Speed of light

A

186,284 miles per second

71
Q

realistic virtual image with a flat field

A

Orthoscopic observation

72
Q

elds interference figures which represent
an optical pattern caused by the behavior of light in individual crystal

A

Conoscopic observation

PERSONAL REVIEWER (28 decks)

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