Incident rays of light parallel to the principal axis of a convex lens, after refraction by the lens, will:
Correct answer: A. Converge at the principal focus
- A. Converge at the principal focus
- B. Diverge from the principal focus
- C. Pass through the optical center unchanged
- D. Be refracted parallel to the principal axis
Explanation
This is the correct answer. A convex lens is a converging lens, meaning it causes parallel incident rays to converge at a point called the principal focus. This is a fundamental property of convex lenses and is used in various optical instruments like cameras and telescopes.Therefore, incident rays parallel to the principal axis of a convex lens will converge at the principal focus after refraction.
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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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