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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)?
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?
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?
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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