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By increasing the aperture of the objective lens, wavelength of light, focal length
of the objective lens and the resolving power of an astronomical telescope
respectively
Options:
of the objective lens and the resolving power of an astronomical telescope
respectively
Solution:
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Verified Answer
The correct answer is:
increases, decreases, is not affected.
(A)
Resolving power of the telescope $\quad \mathrm{RP}=\frac{\mathrm{a}}{1.22 \lambda}$
where a is the diameter (aperture) of the objective lens.
$\Longrightarrow \quad \mathrm{RP} \propto \mathrm{a}$
Thus the aperture of the objective lens is made so large so as to increase the resolving power of the telescope.
Resolving power of the telescope $\quad \mathrm{RP}=\frac{\mathrm{a}}{1.22 \lambda}$
where a is the diameter (aperture) of the objective lens.
$\Longrightarrow \quad \mathrm{RP} \propto \mathrm{a}$
Thus the aperture of the objective lens is made so large so as to increase the resolving power of the telescope.
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