The powers of the objective and eyepiece of a telescope are 0.5 diopter and 10 diopter respectively. The magnifying power of the telescope is
Correct answer: C. 20
- A. 0.5
- B. 10
- C. 20
- D. 0.05
Explanation
The magnifying power of a telescope is given by the formula: Magnifying power = (Focal length of objective lens) / (Focal length of eyepiece lens). Given the powers, the focal lengths are inversely proportional to the powers.
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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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