Tag Archives | electron

Write a short note on Electron microscope

In case of electron microscope, the source of illumination is electron beam. Electrons emitted by cathode filament are deflected by an electromagnetic field and pass smoothly in the high vacuum maintained inside the microscope.

By |2011-01-10T22:40:06+00:00January 10, 2011|Biology|Comments Off on Write a short note on Electron microscope

Can we see electron ?

No. Many of you while going through this article will certainly be curious to see the electron or for that matter any other sub-atomic particle. Let us illustrate with a very simple example to show how we conclude in our day-to-day life.

By |2010-12-30T18:07:34+00:00December 30, 2010|Chemistry|Comments Off on Can we see electron ?

Is electron an essential constituent of all matter ?

In the absence of any electrical or magnetic field, the cathode rays strike the fluorescent screen at point Those, and can be seen as a bright spot there. When a high electric field is applied across the plates P1 and P2 the spot only the screen moves towards the positively charged plate.

By |2010-12-30T18:06:03+00:00December 30, 2010|Chemistry|Comments Off on Is electron an essential constituent of all matter ?
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