Shortcut Methods

1 : Lens Formula Shortcut
  • When dealing with lenses, if the object is at infinity, you can use a shortcut for the image distance ((v)): (vf), where (f) is the focal length of the lens.
  • Similarly, if the image is formed at infinity, you can approximate the object distance ((u)) as (uf).
  • This simplifies calculations for objects far away from or very close to the lens.


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