Question

Which of the following best explains how a scanning electron microscope is used to produce an image of a specimen?

An electron beam strikes the specimen, is absorbed by the specimen, and used to produce an electrically charged image on a screen.

An electron beam passes over the specimen’s surface and displaces electrons, which are then focused on a screen to form an image.

An electron beam traces an outline of the specimen onto a screen, and reflected electrons are collected to form the rest of the image.
An electron beam travels through the specimenand as it does so it burns an

Answer 1

1st