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sara1234 Group TitleBest ResponseYou've already chosen the best response.0
this is what i got Scanning electron microscopes (SEM) are useful for studying the details of a specimen’s surface. The electron beam scans the specimen’s surface, which is coated with a thin layer of gold metal. The electrons that scatter off of the goldcoated surface are focused onto a screen, forming a detailed image of the specimen surface. The image is threedimensional and black and white.
 one year ago

sara1234 Group TitleBest ResponseYou've already chosen the best response.0
Its's between A or B
 one year ago

Peter14 Group TitleBest ResponseYou've already chosen the best response.0
it's not A. The electron beam is scattered off the goldcoated surface, it doesn't pass through the specimen.
 one year ago

sara1234 Group TitleBest ResponseYou've already chosen the best response.0
do you mean it's not B because B say it's passed not a?
 one year ago

Peter14 Group TitleBest ResponseYou've already chosen the best response.0
oh, sorry. It is not absorbed by the specimen.
 one year ago

Peter14 Group TitleBest ResponseYou've already chosen the best response.0
it is B, see how B talks about focusing the scattered electrons onto a screen?
 one year ago

sara1234 Group TitleBest ResponseYou've already chosen the best response.0
therefore it's B?
 one year ago

Peter14 Group TitleBest ResponseYou've already chosen the best response.0
yes if I were you, I would read this for awhile just for background knowledge
 one year ago

Peter14 Group TitleBest ResponseYou've already chosen the best response.0
http://en.wikipedia.org/wiki/Scanning_electron_microscope
 one year ago

Peter14 Group TitleBest ResponseYou've already chosen the best response.0
@sara1234 anything else you need help with?
 one year ago
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