Observing fine detail of biological material investigated with a Microscope.

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Observing fine detail of biological material investigated with

Microscope

Cells are too small to be seen with the human eye, so we need to use microscopes to magnify them. We study simple features of cells with a light or compound microscope.

 The earliest simple microscope was merely a tube with a plate for the object at one end and, at the other, a lens which gave a magnification less than ten diameters -- ten times the actual size. About 1590, two Dutch spectacle makers, Zaccharias Janssen and his son Hans, while experimenting with several lenses in a tube, discovered that nearby objects appeared greatly enlarged. That was the forerunner of the compound microscope and of the telescope. In 1609, Galileo, father of modern physics and astronomy, heard of these early experiments, worked out the principles of lenses, and made a much better instrument with a focusing device.

 Eventually, the light microscope was used to magnify many different thing of the world such as droplets of water. In the droplets of water Leeuwenhoek discovered that the water was filled with many tiny organisms.

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 Another famous scientist named Robert Hooke observed living thing such as flowers, insects, cork, etc. In 1665 he finally published a book of drawings filled with his observations through the light microscope.

This is the picture of the plant cells. A plant cell has a cell wall, vacuole, chloroplast, nucleus, cytoplasm and cell membrane.

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Method

 Before we did the actual experiment, the teacher showed us how to use the microscope. It helped me with my real experiment because I knew what to do.

  • I set up all ...

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