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I am Professor Ernst Ruska. I was born in 25 December 1906 in Heidelberg Germany as the fifth of seven children of Professor Julius Ruska. I finished my school in 1925 than I started to study electrician. I always liked to do experiment and I was really concerned that how Busch theory proofs the effect of magnetic field of coil which electric current is passed. 1
. I started to work with Dr Knoll in 1931 on electron microscope. After working hard for three years. In 1933 I was able to put into use electron microscope by myself which works much better then Light Microscope.

2
In 1928 Max Knoll and I worked together to make a microscope which we successfully discovered a Electron microscope which magnified object only up to 17 times bigger than actual size. In 1937 Canadian American scientist James Hillier worked with me and Max Knoll which we came up with an improvement magnification of 7,000. 3
It has been a lot of improvement between 1982-1989 developed an electron microscope with a magnification up to 2 millions which is 50 times greater than any other actual microscope. There are some advantages and disadvantages for electron microscope 4
The advantages are that we can see an object with greater detail due to High magnifications up to 1000000 and high resolving power up to 0.0002 micrometre.

5
The disadvantages are that preparation of specimens is time consuming difficult and expensive, and also can not view live specimens. These are the thing that we can see with electron Microscope and cant see with light microscope are Endoplasmic Reticulum, Ribosome, and Lisosomes.
6
Endoplasmic Reticulum is an original that is responsible for creation of protein and lipid through the body
Ribosomes are organelles that occurred inside the cell which is responsible for collecting the proteins from the cell.
Lysosomes are cellular organisms that contain amino acid

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