If a convex lens of focal length 'f' is cut into two identical halves along the lens diameter, the focal length of each half is
Correct answer: B. f/2
- A. f
- B. f/2
- C. 2f
- D. 3f/2
Explanation
When a convex lens is cut into two identical halves along the lens diameter, each half acts as a separate lens with half the focal length of the original lens. Therefore, the focal length of each half is /2f/2.
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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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