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MHT CET20255 May 2025Evening ShiftPhysicsRay OpticsActual

Resolving power of a telescope can be increased by increasing

Options

  1. Athe diameter of eyepiece.
  2. Bthe wavelength of light.
  3. Cthe focal length of eye-piece.
  4. Dthe diameter of the objective.

Correct answer

D. the diameter of the objective.

Step-by-step solution

The resolving power of a telescope is determined by its ability to distinguish between closely spaced objects and is given by the formula RP = D 1.22 , where D is the diameter of the objective lens and is the wavelength of light. Since resolving power is directly proportional to D and inversely proportional to , increasing the objective lens diameter enhances resolution, while increasing the wavelength diminishes it. The eyepiece diameter and focal length affect magnification but not resolving power. Thus, increasi

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