Microscope Numerical Aperture Quiz
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Questions and Answers

What is the relationship between the angle θ and the numerical aperture (NA)?

  • $\theta = \frac{A}{NA}$
  • $\theta = \frac{A}{2}$ (correct)
  • $\theta = \frac{NA}{n}$
  • $\theta = \frac{n}{A}$

    • What is the equation that relates the Numerical Aperture (NA) and the refractive index (n) to the angle θ?

  • NA = n(θ)
  • NA = n(cosθ)
  • NA = n(tanθ)
  • NA = n(sinθ) (correct)

    • What determines the value of the angular aperture for image-forming light waves passing through the specimen?

  • The focal length of the objective (correct)
  • The wavelength of the light waves
  • The distance between the objective and the specimen
  • The size of the specimen

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