The powers of the objective and eye piece of telescope are 0.5 diopter and 10 diopter respectively. The magnifying power of telescope is:
Correct answer: C. 20
- A. 0.5
- B. 10
- C. 20
- D. 0.05
Explanation
Magnifying power of telescope = focal length of objective/focal length of eyepiece = power of eyepiece/ power of objective Power of objective = 0.5 D Power of eyepiece = 10 D Magnifying Power of telescope = power of eyepiece/ power of objective = 10/0.5 = 20
This question appeared on the ETEA MDCAT 2011 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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