Let x and y be the distances of the object and image formed by a concave mirror from its focus and f be the focal length, then:
Correct answer: B. xy = f2
- A. xf = y2
- B. xy = f2
- C. x/y = f
- D. x/y = f2
Explanation
The correct answer is Option B:xy = f2 This formula is derived from Newton's mirror relation, which states that cc' = f2 where c is the object distance and c' is the image distance, both measured from the focus. Options A, C, and D are incorrect as they do not align with the correct formula or the concept of object and image distances in concave mirrors.
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About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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