Microscope Numerical Aperture Quiz
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Questions and Answers

What is the relationship between the numerical aperture (NA), the refractive index (n), and the angular aperture (θ)?

  • $NA = \frac{n}{\sin(\theta)}$
  • $NA = n + \sin(\theta)$
  • $NA = n \cdot \sin(\theta)$ (correct)
  • $NA = n - \sin(\theta)$

    • What does the refractive index (n) represent in the context of numerical aperture?

  • The resolving power of the objective
  • The degree of bending of light as it enters the medium
  • The speed of light in the medium (correct)
  • The angle of the cone of light

    • What determines the angular aperture of an objective lens?

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

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