Question
A compound microscope forms an inverted image of an object. In which of the following cases it is kely to create difficulties?
  1. Looking at small germs.
  2. Looking at circular spots.
  3. Looking at a vertical tube containing some water.

Answer

  1. Looking at a vertical tube containing some water
Explantion:

If the experimentalist is looking at a vertical tube containing some water, he has to be careful, as the lower meniscus will appear as upper.

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