Biology 0610 · IGCSE · Size of specimens

Size of specimens — practice question

A specimen is observed through a microscope at $\times 10$ magnification. The image of the specimen has a length of $30\,\text{mm}$. What is the true size of the specimen?

  • A$3\,\mu\text{m}$
  • B$30\,\mu\text{m}$
  • C$300\,\mu\text{m}$
  • D$3000\,\mu\text{m}$

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