Electron microscopes allow the viewer to see much smaller objects than the original light microscopes. The wavelength of electrons is thousands of times smaller than the wavelength of light
Electron Microscopy
Electron microscopes allow the viewer to see much smaller objects than the original light microscopes. The wavelength of electrons is thousands of times smaller than the wavelength of light, with a ratio of around 0.01nm : 500nm, electron wavelength : light wavelength. This overcomes some of the problems faced with light microscopes, such as the depth of focus that can be obtained, the obstruction of objects and the blurred images that often occur due to the wavelengths of light. Electron microscopes can therefore show more detail then light microscopes and can be used to study much smaller objects in finer detail.
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Peer Reviews
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Quality of writing
There are some typing errors which could have been overcome if the candidate had throughly proof read their work. However in general there are few issues with spelling and grammar and the candidate describes the electron microscope accurately using appropriate technical terms.
Level of analysis
The candidate describes the electron microscope in detail and discusses its advantages in comparison to an optic microscope. As well as this they provide information on the different types of electron microscopes and how specimens must be prepared in order to be viewed. Therefore the candidate clearly shows a good level of understanding of this topic. As the information provided is quite descriptive, it would be appropriate to provide a labelled diagram of an electron microscope, the candidate could then refer to different sections of the diagram, this would help the reader understand how the microscope works.
Response to question
The candidate fails to include a suitable introduction to this piece of writing instead they simply dive straight into the essay and its main points. Having a good introduction is essential, it catches the readers attention and motivates them to read all of your essay rather than skim through it. Your introduction should include the topics you plan to discuss, it should be brief and to the point, save the detail for the bulk of the essay. On a positive note the candidate gives an in depth response to the set topic.