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Zoom lenses (sometimes referred to as "true" zoom) are ideally parfocal, in that focus is maintained as the lens is zoomed (i.e., focal length and magnification changed), which is convenient and has the advantage of allowing more accurate focusing at maximal focal length then zooming back to a shorter focal length to compose the image.
Principle of immersion microscopy. Path of rays with immersion medium (yellow) (left half) and without (right half). Rays (black) coming from the object (red) at a certain angle and going through the cover-slip (orange, as is the slide at the bottom) can enter the objective (dark blue) only when immersion is used.
Optical microscopy is used extensively in microelectronics, nanophysics, biotechnology, pharmaceutic research, mineralogy and microbiology. [28] Optical microscopy is used for medical diagnosis, the field being termed histopathology when dealing with tissues, or in smear tests on free cells or tissue fragments. [citation needed]
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
Bacteria display a large diversity of cell morphologies and arrangements.. Bacterial cellular morphologies are the shapes that are characteristic of various types of bacteria and often key to their identification.
A microbiologist (from Greek μῑκρος) is a scientist who studies microscopic life forms and processes. This includes study of the growth, interactions and characteristics of microscopic organisms such as bacteria, algae, fungi, and some types of parasites and their vectors. [1]
It is the study of the interactions between living organisms and their environment, and how these interactions affect the organisms and their environment. Additionally, it is a multidisciplinary area of study, combining elements of biology, chemistry, physics, mathematics and urban planning. It focuses on the study of the interactions between ...
Formation of a prophage. A prophage is a bacteriophage (often shortened to "phage") genome that is integrated into the circular bacterial chromosome or exists as an extrachromosomal plasmid within the bacterial cell. [1]