Exam 8: The Microscope

The SEM produces an image that is stereoscopic in appearance.

As magnifying power increases,the microscope's depth of focus decreases.

A parfocal microscope:

The ________ allows the forensic scientist to view a particle under a microscope while at the same time obtaining its absorption spectrum.

An IR spectrum is unique for every chemical substance.

The ________ microscope presents a three-dimensional image of an object.

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

The microscopic examination of a bullet requires reflected light.

Which microscope provides a right-side-up image?

A ________ uses a stream of electrons to create an image of the specimen being studied.

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

A(n)________ image is an image formed when light rays converge on a surface.

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

As magnifying power increases,the microscope's field of view also increases.

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

The stereoscopic microscope has a narrow field of view.

The ________ lens magnifies the real,enlarged image created by the objective lens,producing a greatly enlarged virtual image of the object.

Bullets fired through the same barrel display comparable markings,called striations,caused by the rifling of the barrel.

The magnification power of a microscope equals the magnifying power of the objective lens multiplied by two.

Unique shapes,aperture type,and surface ________ are typically used to identify spore samples.