Chapter 7 Flashcards
An image that cannot be seen directly, it can be seen only by a viewer looking through a lens
Virtual image
An image formed by the actual convergence of light rays on a screen
Real image
The lower lens of a microscope, which is positioned directly over the specimen
Objective lens
The lens of a microscope into which the viewer looks; same as the occular lens
Eyepiece lens
Light that passes up from the condenser and through the specimen
Transmitter illumination
Illumination of a specimen from above; in microscopy it is used to examine opaque specimens
Vertical or reflected illumination
The lens system under the microscope stage that focuses light onto the specimen
Condenser
Describes a microscope such that when an image is focused with one objective in position, the other objective can be rotated into place and the field will remain in focus
Parfocal
Describes a microscope with one eyepiece
Monocular
Describes a microscope with two eyepieces
Binocular
The area of the specimen that can be seen after it is magnified
Field of view
The thickness of a specimen that is entirely in focus under a microscope
Depth of focus
Light confined to a single plane of vibration
Plane-polarized light
A device that permits the passage of light waves vibrating in only one plane
Polarizer
An instrument that links a microscope to a spectrophotometer
Microspectrophotometer
Pollen grain wall; carries the “sperms” needed for plant reproduction
Exine
Pollen is dispersed by the wind
Anemophilous
Pollen is carried and dispersed by insects or small animals
Entomophilous
The openings on pollen grains from which the pollen tube grows and carries the sperms to the egg to complete fertilization
Apertures
Refers to the pattern of the pollen grain surface
Sculpturing
The estimated production and dispersal patterns of spores and pollen
Pollen rain
