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(a) Using the Rayleigh criterion, estimate the theoretical diffraction limit for the angular resolution of a typical 20-cm (8-in) amateur telescope at 550 nm. Express your answer in arcseconds.

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mshahzaib247

Answer:

0.692" arc sec.

Explanation:

Tan Ꝋ = Sin Ꝋ = ꝊR = 1.22 (Wavelength) / d

ꝊR = 1.22 x 550 x 10^-9m / 0.2m

= 3.355 x 10^-6 rad x (3600 × 180) / π = 0.692" arc sec.

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