please tell me the summary of physics ch. cell
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Answer:
The discovery of cells:
All living organisms are made of cells.
Cells are very small therefore magnifying instruments such as lenses and microscopes are used to view them.
By using a light microscope the simple features of cells can be studied. The light microscope uses a beam of light focused by various glass lenses.
Electron microscopes have higher power of magnification than the ordinary light microscope, therefore allowing us to see very small structures inside the cells. These microscopes use a beam of electrons focused by electromagnets to magnify objects instead of light rays and lenses.
Robert Hooke (1665) used a light microscope to examine non-living cork cells.
Antonie van Leeuwenhoek was the first person to observe living cells using a microscope.
The development of cell theory was from the study of microscopic cells.
Answer:
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