Test
Forensic Science Chapter 7
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Preguntas del test (42)
1compound microscope is equipped with two objective lenses (10x and 45x) and has a 10x ocular lens. The highest magnification attainable with this instrument is:
- A65x
- B100x
- C650x
- D450x
2In order to examine an opaque object with a compound microscope, one must:
- AUse transmitted illumination.
- BLight the object from beneath the stage.
- CUse reflected illumination.
- DStain the object before viewing it.
3A parfocal microscope:
- AEliminates the need to stain the specimen to be viewed.
- BHas two ocular lenses.
- CRequires a polarized light source.
- DAllows for ease of focusing when switching from low to high power.
4As the magnification of the compound microscope is increased, the field of view:
- ADecreases
- BRemains the same
- CIncreases
- DBecomes more focused
5As the magnifying power of the compound microscope increases, the depth of focus:
- ARemains the same
- BDecreases
- CIncreases
- DBecomes less focused
6A comparison microscope designed to examine bullets and fibers is equipped with:
- AVertical illumination.
- BTransmitted illumination.
- COblique illumination.
- DBoth A and B.
7When using a compound microscope, the areas above and below the depth of focus are best viewed by adjusting the:
- AEyepiece lens.
- BFine or coarse adjustment.
- CIntensity of the illumination.
- DNumerical aperture.
8Which microscope has the largest potential working distance?
- ASteroscopic
- BComparison
- CPolarizing
- DCompound
9Which microscope provides a right-side-up image?
- AComparison
- BSteroscopic
- CCompound
- DPolarizing
10In the design of a polarizing microscope, the polarizer is placed between the:
- ASpecimen and the analyzer.
- BAnalyzer and the eyepiece.
- CLight source and the sample stage.
- DSample stage and the analyzer.
11Normally with a polarizing microscope, the polarizer and analyzer are set:
- AParallel to each other.
- BSo that maximum plane polarized light can reach the eyepiece.
- CPerpendicular to each other.
- DSo that they are in constant motion.
12Which microscope is best suited to the study of birefringent minerals and fibers?
- AStereoscopic
- BMicrospectrophotometer
- CPolarizing
- DComparison
13The condenser of a compound microscope is located:
- AAt the base.
- BWithin the body tube.
- CBeneath the stage.
- DBetween the coarse and fine adjustments.
14Which microscope plots an absorption spectrum of the item under examination?
- APolarizing
- BComparison
- CStereoscopic
- DMicrospectrophotometer
15A microscope with which light source, when linked to a spectrophotometer, will provide a "fingerprint" spectrum of the object being viewed?
- A Visible
- BPlane polarized
- CIR (infrared)
- DUV (ultraviolet)
16 _____ are used to focus the SEM (scanning electron microscope).
- AAnalyzers
- BLenses
- CPolarizers
- DMagnets
17 The image produced by an SEM is initially displayed on:
- AAn X-ray analyzer.
- BPhotographic paper.
- CAn X-ray film.
- DA cathode ray tube.
18The microscope that provides the highest resolution and greatest depth of focus is the:
- ASEM
- BComparison
- CCompound
- DSteroscopic
19Which microscope can be linked to an X-ray analyzer?
- ASEM
- BMicrospectrophotometer
- CSteroscopic
- DPolarizing
20Which microscope is most likely to be used as a tool for determining whether or not a suspect has recently fired a gun?
- AComparison
- BPolarizing
- CSEM
- DSteroscopic
21When the SEM's primary electron beam bombards a specimen, it causes the emission of:
- AElectrons from elements of the upper layer of the specimen.
- BX-rays from the target.
- CGamma rays from the target.
- DBoth A and B.
22Richard Bruno Hauptmann was convicted of the kidnap and murder of the Lindbergh child in part on the basis of optical examination of:
- AGSR (gunshot residue)
- BWood
- CHair
- DFibers
23A microscope uses a combination of _____ to magnify an image.
- AStages
- BMirrors
- CLenses
- DConfocals
24A type of image that cannot be viewed directly is called a(n) ___________ image.
- AReal
- BImaginary
- CReflected
- DVirtual
25A transparent specimen is viewed through a microscope using _____ light while an opaque object requires _____ illumination.
- ATransmitted; stereoscopic
- BConfocal; transmitted
- CVertical; horizontal
- DTransmitted; vertical
26The size of the specimen area in view is known as the:
- ADepth of field.
- BField of view.
- CStage size.
- DObjective.
27 Crystals that are _____ produce two planes of polarized light, each perpendicular to the other.
- AAmporphous
- BSolid
- CBirefringent
- DColored
28If crystals of unknown origin are viewed under a polarizing microscope and appear dark, what can be concluded about the crystals?
- AThe crystals are not heroin crystals
- BThe crystals are colorless
- CThe crystals are polarizing
- DThe crystals are non-polarizing
29What instrument can be used to view a single fiber found at a crime scene and identify its generic class?
- AInfrared microspectrophotometer
- BStereoscopic microscope
- CPolarizing microscope
- DBoth a and c
30The major advantages of the SEM image include all of the following except:
- AHigh magnification.
- BHigh reproducibility.
- CHigh resolution.
- DGreat depth of focus.
31Components of a compound microscope include all of the following except:
- AExpander.
- BStage.
- CCoarse adjustment.
- DCondenser.
32An objective lens with a numerical aperture of 1.50 can separate details at half the distance of a lens with a numerical aperture of:
- A0.65
- B3.00
- C30.00
- D0.75
33An object with the letter "L" is viewed under low power of a compound microscope. The image would appear as:
- ARegular
- BUpside-down, Flipped
- CUpside-down
- DFlipped
34The magnification power of a microscope equals the magnifying power of the:
- AEyepiece lens.
- BObjective lens.
- CObjective lens multiplied by two.
- DObjective lens multiplied by the eyepiece lens.
35The microscope examination of a bullet requires:
- ATransmitted light.
- BReflected light.
- CCondensed light.
- DAll of the above.
36Which of these is not part of the optical system of a compound microscope?
- AAbbé condenser
- BObjective lens
- CEyepiece lens
- DThe body tube
37Which of the following statements is false?
- AIf the polarizer and analyzer of a polarizing microscope are placed parallel to each other, no light will penetrate.
- BLight confined to a single plane of vibration is said to be polarized.
- CMany crystals are birefringent.
- DThe lens nearest the specimen is called the objective lens.
38The most important tool of the firearms examiner is the:
- ACompound microscope.
- BComparison microscope.
- CStereoscopic microscope.
- DPolarizing microscope.
39Which of the following is false?
- AThe scanning electron microscope (SEM) produces an image by aiming a beam of electrons onto a specimen.
- BThe major attraction of the SEM is its high magnification and depth of field.
- CThe SEM produces an image that is stereoscopic in appearance.
- DMicrowaves are generated when the electron beam of the SEM strikes a target.
40Palynology is the study of:
- AFish
- BInsects
- CBirds
- DSpores
41Which type of pollen is rarely deposited on objects except by direct contact with the plant?
- AAnemophilous
- BExine
- CEntomophilous
- DGameotphyte
42The pattern of the pollen grain surface is called:
- ASculpturing.
- BApertures.
- CExine.
- DPollen rain.
Información
- Descripción
- Test sobre Forensic Science Chapter 7, creado por cheetahgoddess el 01/10/2014.
- Autor
- cheetahgoddess
- Idioma
- English
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