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Phase Contrast MicroscopyPhase contrast microscope has the resolving power similar to ordinary light microscope. However, it enables us to observe the cellular organelles in living cell. The working of this microscope is based on the principle of phase contrast.To understand phase contrast microscopy you should know that whenever two light waves interfere with each other, the resultant light wave may have either greater or lesser amplitude depending on the phases of the light waves (Figure shown below).
It is a known fact that a light wave passing through a transparent object suffers a change in phase.The living cells are heterogeneous in their cellular components having different thickness. Due to this difference, each component has different refractive index. Hence, when a light wave passes through the cell, a change in phase is produced due to differences of thickness and refractive indices of cellular components. The phase contrast microscope exaggerates the small difference between the phases and enables one to distinguish the adjacent structures.
Neck Inspect and palpate the neck for any mass, check if neck is short, and webbed which is indicative of Turner's syndrome. Palpate posteriorly along cervical spine; later
What is photoperiod? Photoperiod is the daily time period of light exposure of a living being. The photoperiod might be vary according to the period of the year.
Q. Do bacteria cells have a nucleus? In bacteria the genetic material is dispersed in the cytosol and there is no inner membrane that delimits a nucleus.
general characteristic of phylum protozoa
How Phosphorus in Blood is presented? Phosphorus in Blood is Present as: 1. Inorganic phosphorus in the form of HPO 4 or H 2 PO 4 2. Organic or ester phosphorus such
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plants
Explain Central and Peripheral Nervous System - Geriatric Nutrition? Age related changes occur in various senses related to the cranial nerves-vision, hearing, taste and smell
What are the functions of the Eyelids? Functions of the Eyelids: The eyelid makes the outer most layers, covering the eye. Because of its strategic position, the eyelid s
Q. Define Premotor Cortex Located in the frontal lobes? Premotor Cortex - Involved in control of more complex, learned motor skills like writing, driving, etc. Broca's area or
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