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Physics in industry, ![image](attached://4466dacd7ad6f7b245105a45d503cb3a…

- - - - A one-dimensional ultrasound scan used to determine the distance or depth of an internal structure
    - - A B-scan, or brightness scan, is a more complex scan that produces a 2D or 3D image of internal structures in the body
- - - - Short sighted
        
        Contact lenses and glasses correct shortsightedness using concave lenses with diverging light rays, which reduces the eye's focusing power. This moves the eye's focus point backward, onto the retina.
      - Far sighted
        
        Use convex lenses, and converge light rays inwards.
  - - - collects light from a distant object and refracts it to a focal point
      - Larger objective lenses gather more light, improving image brightness and clarity