Dissemination of IT for the Promotion of Materials ScienceDoITPoMS Teaching and Learning Packages

Optical Microscopy and Specimen Preparation

Answer to Q6

 
  1. Contrast in reflected microscopy tends to be caused by:
    a Variations in topography and differences in reflectivity of areas.

    Correct!
    b Only differences in reflectivity of areas.

    (Incorrect: it can also be caused by topography.)
    c Only topography.

    (Incorrect: it can also be caused by differences in reflectivity of areas.)
    d Variations in thickness of the specimen.

    (Incorrect: contrast is caused by variations in topography and differences in reflectivity of areas.)
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