The resolving power of an astronomical telescope can be significantly increased by:
A. Decreasing the focal length of the eyepiece.
B. Increasing the aperture (diameter) of the objective lens.
C. Increasing the focal length of the objective lens.
D. Using light of a longer wavelength.
Answer: Option B
Solution (By JKSSB Mock Tests)
Resolving power is a telescope's ability to distinguish closely spaced objects (like double stars) as separate. It is proportional to D / lambda, where D is the diameter (aperture) of the objective lens and lambda is the wavelength of light. Increasing the aperture D directly and strictly increases the resolving power.
Explanation:
Convection involves bulk movement of fluid particles (liquid/gas). Conduction: vibration transfer without particle movement. Radiation: EM waves. Absorption is taking in heat.
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