Tools and Techniques Used in Biology

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A microscope is an instrument that magnifies and resolves tiny objects, making it possible to see structures too small to be viewed with the naked eye. It not only enlarges the image but also distingu…

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Magnification is the ratio of the size of the image produced by a microscope to the actual size of the object. For example, if a cell appears 100 times larger under the microscope, the magnification i…

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Resolving power is the ability of a microscope to distinguish between two closely spaced points as separate entities. Higher resolving power means clearer and more detailed images. Electron microscope…

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Anton Van Leeuwenhoek developed the first microscope in the 17th century. His simple microscope used a single biconvex lens and could magnify objects up to 300 times. He was the first to observe bacte…

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A simple microscope uses a single biconvex lens to magnify an object. Examples include hand lenses and dissecting microscopes. It is used to view whole objects at low magnification and does not requir…

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A compound microscope uses two sets of lenses — the objective lens and the eyepiece (ocular lens) — to achieve higher magnification. It uses transmitted light and can magnify objects up to 1500×. It i…

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1. Lenses: Simple microscope uses one lens; compound microscope uses two or more lenses. 2. Magnification: Simple offers lower magnification (up to 10–30×); compound provides higher magnification (up …

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The phase-contrast microscope enhances contrast in transparent, unstained living cells. It allows observation of dynamic processes like mitosis, phagocytosis, and movement of organelles without killin…