The resolving power of the lens can be improved by using
Correct answer: C. Light of short wavelength
- A. Lens of short focal length
- B. Lens of large focal length
- C. Light of short wavelength
- D. Light of large wavelength
Explanation
Resolution depends on the wavelength of the light source. The smaller the wavelength, the greater the resolution. Hence, option D is wrong, and option C is the correct answer here.It is independent of focal length, so options A and B are wrong.
This question appeared on the ETEA MDCAT 2006 paper, which you can sit online with every answer explained.
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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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