Determine the resolution of a refractor with a diameter of 80 mm.

We will use the formula to determine the resolution of the telescope n = (l * 206265 “) / D * 2.44 where D is the diameter of the telescope, A, is the wavelength at which the observation is carried out. For the visible range, n = 5.5 x 10 ~ 7 m. Substitute the values: n = l * 206256 “/ D * 2.44 = 5/5 * 10 ^ -7 * 206265″ / 8 * 10 ^ -2 m * 2.44 = 3.46 ”
Answer 3.46 “