1. Tardigrade
  2. Question
  3. Physics
  4. With a concave mirror an object is placed at a distance x1 from the principle focus on the principal axis. The image is formed at a distance x2 from the principal focus. The focal length of the mirror is :-

Q. With a concave mirror an object is placed at a distance from the principle focus on the principal axis. The image is formed at a distance from the principal focus. The focal length of the mirror is :-

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Solution:

By Newton's formula,