Multiple Choice Quiz

1		How does the scanning electron microscope differ from the transmission electron microscope? It:
			A)	uses electromagnetic lenses.
			B)	operates with a vacuum.
			C)	uses an electron beam.
			D)	maps images rather than optically projecting them.
			E)	produces monochrome images.
2		Resolution in a microscope is primarily determined by which lens?
			A)	Ocular
			B)	Condenser
			C)	Objective
			D)	Projector
			E)	Intermediate
3		Secondary electrons used in SEM have energies of:
			A)	less than 50 electron volts
			B)	50 – 150 electron volts
			C)	250 – 300 electron volts
			D)	greater than 500 electron volts
			E)	Varied energies in the above ranges depending on the atomic number of specimens.
4		Most noteworthy plant anatomist of the 20th century.
			A)	John Ray
			B)	Robert Hooke
			C)	Katherine Esau
			D)	Eduard Strasburger
			E)	Robert Brown
5		The primary limiting factor for resolution in a light microscope is the:
			A)	quality of the lenses.
			B)	numerical apertures.
			C)	index of refraction.
			D)	angle of illumination into the objective lens.
			E)	wavelength of light
6		Which instrument gives the most "3-dimensional-like" image (greatest Z-axis of focus)?
			A)	Compound light microscope
			B)	Transmission electron microscope
			C)	Scanning electron microscope
			D)	Atomic force microscope
			E)	A single-lens microscope
7		In its optical design, the transmission electron microscope is most like a(n):
			A)	scanning electron microscope.
			B)	atomic force microscope.
			C)	single-lens microscope.
			D)	confocal microscope.
			E)	compound light microscope (brightfield).
8		Which instrument is best used to view the structure of viruses? A___.
			A)	single-lens microscope
			B)	confocal microscope
			C)	scanning electron microscope
			D)	transmission electron microscope
			E)	compound light microscope (brightfield)
9		The primary advantage of a lens in a camera over a pinhole is:
			A)	greater light-gathering power.
			B)	a fixed focal length.
			C)	a small numerical aperture.
			D)	greater empty magnification.
			E)	lower cost.
10		The physical principles of microscope resolution was first determined by:
			A)	Ernst Abbe.
			B)	Koehler.
			C)	J. J. Thompson.
			D)	T. Everhardt.
			E)	Carl Zeiss.