The resolving power of a telescope can be increased by:
Correct answer: A. increasing the objective focal length and decreasing the eyepiece focal length
- A. increasing the objective focal length and decreasing the eyepiece focal length
- B. increasing the lens diameters
- C. decreasing the lens diameters
- D. inserting a correction lens between objective and eyepiece
Explanation
Reason: Increasing the objective focal length and decreasing the eyepiece focal length improves the resolving power of the telescope by enhancing the ratio of the focal length of the objective lens to the wavelength of light.
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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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