Exam 8: The Microscope

A forensic scientist would use vertical illumination when studying opaque specimens.

If the ________ on two bullets viewed through a comparison microscope are alike, the examiner can conclude that both bullets traveled through the same barrel.

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

The microscopic examination of a bullet requires reflected light.

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

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

What happens to a light beam that passes through a polarizing crystal? What happens when plane-polarized light passes through a second polarizing crystal set perpendicular to the first crystal?

The body tube is part of the optical system of a compound microscope.

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

A parfocal microscope:

An IR spectrum is unique for every chemical substance.

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

Match the word in Column 1 to its definition in Column 2. Each answer can only be used once. A)Size of the specimen area being observed B)Provides a simultaneous view of two specimens C)Space between the specimen and objective lens D)Illumination required to view a transparent object E)Illumination of a specimen from above F)The thickness of a specimen in focus G)Eyepiece multiplied by objective lens H)The image seen through a compound microscope I)The lower lens of a microscope positioned directly over the specimen J)Presents a distinctive three-dimensional image K)Used to examine birefringent materials L)Image formed by the actual convergence of light rays on a screen -Objective lens

The infrared microspectrophotometer is used to analyze fibers and paints.

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

Match the word in Column 1 to its definition in Column 2. Each answer can only be used once. A)Size of the specimen area being observed B)Provides a simultaneous view of two specimens C)Space between the specimen and objective lens D)Illumination required to view a transparent object E)Illumination of a specimen from above F)The thickness of a specimen in focus G)Eyepiece multiplied by objective lens H)The image seen through a compound microscope I)The lower lens of a microscope positioned directly over the specimen J)Presents a distinctive three-dimensional image K)Used to examine birefringent materials L)Image formed by the actual convergence of light rays on a screen -Polarizing microscope

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

The image produced by an SEM is initially displayed on:

The size of the specimen area that can be seen is known as the:

Match the word in Column 1 to its definition in Column 2. Each answer can only be used once. A)Size of the specimen area being observed B)Provides a simultaneous view of two specimens C)Space between the specimen and objective lens D)Illumination required to view a transparent object E)Illumination of a specimen from above F)The thickness of a specimen in focus G)Eyepiece multiplied by objective lens H)The image seen through a compound microscope I)The lower lens of a microscope positioned directly over the specimen J)Presents a distinctive three-dimensional image K)Used to examine birefringent materials L)Image formed by the actual convergence of light rays on a screen -Virtual image