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Quiz on Forensic Science Chapter 7, created by cheetahgoddess on 01/10/2014.

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Forensic Science Chapter 7

Question 1 of 42

1

compound microscope is equipped with two objective lenses (10x and 45x) and has a 10x ocular lens. The highest magnification attainable with this instrument is:

Select one of the following:

  • 65x

  • 100x

  • 650x

  • 450x

Explanation

Question 2 of 42

1

In order to examine an opaque object with a compound microscope, one must:

Select one of the following:

  • Use transmitted illumination.

  • Light the object from beneath the stage.

  • Use reflected illumination.

  • Stain the object before viewing it.

Explanation

Question 3 of 42

1

A parfocal microscope:

Select one of the following:

  • Eliminates the need to stain the specimen to be viewed.

  • Has two ocular lenses.

  • Requires a polarized light source.

  • Allows for ease of focusing when switching from low to high power.

Explanation

Question 4 of 42

1

As the magnification of the compound microscope is increased, the field of view:

Select one of the following:

  • Decreases

  • Remains the same

  • Increases

  • Becomes more focused

Explanation

Question 5 of 42

1

As the magnifying power of the compound microscope increases, the depth of focus:

Select one of the following:

  • Remains the same

  • Decreases

  • Increases

  • Becomes less focused

Explanation

Question 6 of 42

1

A comparison microscope designed to examine bullets and fibers is equipped with:

Select one of the following:

  • Vertical illumination.

  • Transmitted illumination.

  • Oblique illumination.

  • Both A and B.

Explanation

Question 7 of 42

1

When using a compound microscope, the areas above and below the depth of focus are best viewed by adjusting the:

Select one of the following:

  • Eyepiece lens.

  • Fine or coarse adjustment.

  • Intensity of the illumination.

  • Numerical aperture.

Explanation

Question 8 of 42

1

Which microscope has the largest potential working distance?

Select one of the following:

  • Steroscopic

  • Comparison

  • Polarizing

  • Compound

Explanation

Question 9 of 42

1

Which microscope provides a right-side-up image?

Select one of the following:

  • Comparison

  • Steroscopic

  • Compound

  • Polarizing

Explanation

Question 10 of 42

1

In the design of a polarizing microscope, the polarizer is placed between the:

Select one of the following:

  • Specimen and the analyzer.

  • Analyzer and the eyepiece.

  • Light source and the sample stage.

  • Sample stage and the analyzer.

Explanation

Question 11 of 42

1

Normally with a polarizing microscope, the polarizer and analyzer are set:

Select one of the following:

  • Parallel to each other.

  • So that maximum plane polarized light can reach the eyepiece.

  • Perpendicular to each other.

  • So that they are in constant motion.

Explanation

Question 12 of 42

1

Which microscope is best suited to the study of birefringent minerals and fibers?

Select one of the following:

  • Stereoscopic

  • Microspectrophotometer

  • Polarizing

  • Comparison

Explanation

Question 13 of 42

1

The condenser of a compound microscope is located:

Select one of the following:

  • At the base.

  • Within the body tube.

  • Beneath the stage.

  • Between the coarse and fine adjustments.

Explanation

Question 14 of 42

1

Which microscope plots an absorption spectrum of the item under examination?

Select one of the following:

  • Polarizing

  • Comparison

  • Stereoscopic

  • Microspectrophotometer

Explanation

Question 15 of 42

1

A microscope with which light source, when linked to a spectrophotometer, will provide a "fingerprint" spectrum of the object being viewed?

Select one of the following:

  • Visible

  • Plane polarized

  • IR (infrared)

  • UV (ultraviolet)

Explanation

Question 16 of 42

1

_____ are used to focus the SEM (scanning electron microscope).

Select one of the following:

  • Analyzers

  • Lenses

  • Polarizers

  • Magnets

Explanation

Question 17 of 42

1

The image produced by an SEM is initially displayed on:

Select one of the following:

  • An X-ray analyzer.

  • Photographic paper.

  • An X-ray film.

  • A cathode ray tube.

Explanation

Question 18 of 42

1

The microscope that provides the highest resolution and greatest depth of focus is the:

Select one of the following:

  • SEM

  • Comparison

  • Compound

  • Steroscopic

Explanation

Question 19 of 42

1

Which microscope can be linked to an X-ray analyzer?

Select one of the following:

  • SEM

  • Microspectrophotometer

  • Steroscopic

  • Polarizing

Explanation

Question 20 of 42

1

Which microscope is most likely to be used as a tool for determining whether or not a suspect has recently fired a gun?

Select one of the following:

  • Comparison

  • Polarizing

  • SEM

  • Steroscopic

Explanation

Question 21 of 42

1

When the SEM's primary electron beam bombards a specimen, it causes the emission of:

Select one of the following:

  • Electrons from elements of the upper layer of the specimen.

  • X-rays from the target.

  • Gamma rays from the target.

  • Both A and B.

Explanation

Question 22 of 42

1

Richard Bruno Hauptmann was convicted of the kidnap and murder of the Lindbergh child in part on the basis of optical examination of:

Select one of the following:

  • GSR (gunshot residue)

  • Wood

  • Hair

  • Fibers

Explanation

Question 23 of 42

1

A microscope uses a combination of _____ to magnify an image.

Select one of the following:

  • Stages

  • Mirrors

  • Lenses

  • Confocals

Explanation

Question 24 of 42

1

A type of image that cannot be viewed directly is called a(n) ___________ image.

Select one of the following:

  • Real

  • Imaginary

  • Reflected

  • Virtual

Explanation

Question 25 of 42

1

A transparent specimen is viewed through a microscope using _____ light while an opaque object requires _____ illumination.

Select one of the following:

  • Transmitted; stereoscopic

  • Confocal; transmitted

  • Vertical; horizontal

  • Transmitted; vertical

Explanation

Question 26 of 42

1

The size of the specimen area in view is known as the:

Select one of the following:

  • Depth of field.

  • Field of view.

  • Stage size.

  • Objective.

Explanation

Question 27 of 42

1

Crystals that are _____ produce two planes of polarized light, each perpendicular to the other.

Select one of the following:

  • Amporphous

  • Solid

  • Birefringent

  • Colored

Explanation

Question 28 of 42

1

If crystals of unknown origin are viewed under a polarizing microscope and appear dark, what can be concluded about the crystals?

Select one of the following:

  • The crystals are not heroin crystals

  • The crystals are colorless

  • The crystals are polarizing

  • The crystals are non-polarizing

Explanation

Question 29 of 42

1

What instrument can be used to view a single fiber found at a crime scene and identify its generic class?

Select one of the following:

  • Infrared microspectrophotometer

  • Stereoscopic microscope

  • Polarizing microscope

  • Both a and c

Explanation

Question 30 of 42

1

The major advantages of the SEM image include all of the following except:

Select one of the following:

  • High magnification.

  • High reproducibility.

  • High resolution.

  • Great depth of focus.

Explanation

Question 31 of 42

1

Components of a compound microscope include all of the following except:

Select one of the following:

  • Expander.

  • Stage.

  • Coarse adjustment.

  • Condenser.

Explanation

Question 32 of 42

1

An objective lens with a numerical aperture of 1.50 can separate details at half the distance of a lens with a numerical aperture of:

Select one of the following:

  • 0.65

  • 3.00

  • 30.00

  • 0.75

Explanation

Question 33 of 42

1

An object with the letter "L" is viewed under low power of a compound microscope. The image would appear as:

Select one of the following:

  • Regular

  • Upside-down, Flipped

  • Upside-down

  • Flipped

Explanation

Question 34 of 42

1

The magnification power of a microscope equals the magnifying power of the:

Select one of the following:

  • Eyepiece lens.

  • Objective lens.

  • Objective lens multiplied by two.

  • Objective lens multiplied by the eyepiece lens.

Explanation

Question 35 of 42

1

The microscope examination of a bullet requires:

Select one of the following:

  • Transmitted light.

  • Reflected light.

  • Condensed light.

  • All of the above.

Explanation

Question 36 of 42

1

Which of these is not part of the optical system of a compound microscope?

Select one of the following:

  • AbbĂ© condenser

  • Objective lens

  • Eyepiece lens

  • The body tube

Explanation

Question 37 of 42

1

Which of the following statements is false?

Select one of the following:

  • If the polarizer and analyzer of a polarizing microscope are placed parallel to each other, no light will penetrate.

  • Light confined to a single plane of vibration is said to be polarized.

  • Many crystals are birefringent.

  • The lens nearest the specimen is called the objective lens.

Explanation

Question 38 of 42

1

The most important tool of the firearms examiner is the:

Select one of the following:

  • Compound microscope.

  • Comparison microscope.

  • Stereoscopic microscope.

  • Polarizing microscope.

Explanation

Question 39 of 42

1

Which of the following is false?

Select one of the following:

  • The scanning electron microscope (SEM) produces an image by aiming a beam of electrons onto a specimen.

  • The major attraction of the SEM is its high magnification and depth of field.

  • The SEM produces an image that is stereoscopic in appearance.

  • Microwaves are generated when the electron beam of the SEM strikes a target.

Explanation

Question 40 of 42

1

Palynology is the study of:

Select one of the following:

  • Fish

  • Insects

  • Birds

  • Spores

Explanation

Question 41 of 42

1

Which type of pollen is rarely deposited on objects except by direct contact with the plant?

Select one of the following:

  • Anemophilous

  • Exine

  • Entomophilous

  • Gameotphyte

Explanation

Question 42 of 42

1

The pattern of the pollen grain surface is called:

Select one of the following:

  • Sculpturing.

  • Apertures.

  • Exine.

  • Pollen rain.

Explanation

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