Question:
Resolving power of a telescope can be increased by increasing
Resolving power of a telescope can be increased by increasing
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A larger objective lens collects more light and produces a sharper image by reducing diffraction.
Updated On: Apr 30, 2026
- (the diameter of eyepiece.)
- (the wavelength of light.)
- (the focal length of eye-piece.)
- (the diameter of the objective.)
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The Correct Option is D
Solution and Explanation
Step 1: Formula
The resolving power (R.P.) of a telescope is given by $R.P. = \frac{D}{1.22\lambda}$, where $D$ is the diameter of the objective lens.
Step 2: Analysis
* Increasing $D$ (aperture) directly increases the resolving power. * Increasing $\lambda$ (wavelength) decreases the resolving power. * Focal length or eyepiece diameter do not affect the theoretical resolving power.
Step 3: Conclusion
Increasing the diameter of the objective increases the resolving power.
Final Answer: (D)
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