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Resolving Power of Telescope | Physics | B.Sc / M.Sc
In this video, we discuss the resolving power of a telescope, its definition, formula, principle, and numerical understanding.
This topic is very important for B.Sc Physics, M.Sc Physics, Classical Optics, and various entrance exams.

What is Resolving Power?
Resolving power of a telescope is the ability to distinguish between two closely spaced objects.
Higher resolving power means the telescope can separate objects that are very close to each other in the field of view.

Formula:
Resolving Power (R.P.) = 1 / θ
Where θ = Angular separation (in radians)

Or using diffraction at objective lens:
θ = 1.22 λ / D
Where,
λ = Wavelength of light
D = Diameter of objective lens


Therefore,
Resolving Power R = D / (1.22 λ)

This explanation is helpful for:

B.Sc Semester Exams

M.Sc Entrance and PGAT Exam

Optics and Practical Viva

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