what do you mean by the resolving power of instrument?write expression

1.	what do you mean by the resolving power of instrument?write expression foe resolving power a telescope.
Answer» 1. Resolving power is the capacity of an instrument to resolve two points which are close together.2. In telescopes, very close objects such as binary stars or individual stars of galaxies subtend very small angles on the telescope. To resolve them we need very large apertures. We can use the Rayleigh’s to determine the resolving power. The angular separation between two objects must be △θ = 1.22 λd Resolving power = 1△θ = d1.22 λ Thus higher the diameter d, better the resolution. The best astronomical optical telescopes have mirror diameters as large as 10m to achieve the best resolution. Also larger wavelengths reduce the resolving power and consequently radio and microwave telescopes need larger mirrors.

what do you mean by the resolving power of instrument?write expression foe resolving power a telescope.

Answer»

1. Resolving power is the capacity of an instrument to resolve two points which are close together.2. In telescopes, very close objects such as binary stars or individual stars of galaxies subtend very small angles on the telescope. To resolve them we need very large apertures. We can use the Rayleigh’s to determine the resolving power. The angular separation between two objects must be

△θ = 1.22 λd

Resolving power = 1△θ = d1.22 λ

Thus higher the diameter d, better the resolution. The best astronomical optical telescopes have mirror diameters as large as 10m to achieve the best resolution. Also larger wavelengths reduce the resolving power and consequently radio and microwave telescopes need larger mirrors.

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