# Problem: Problem 10: A small telescope has a concave mirror with a 2.4 m radius of curvature for its objective. Its eyepiece is a 3.2 cm focal length lens Randomized Variables R = 2.4 m fe = 3.2 cm Part (a) What is the telescope's angular magnification? Part (b) What angle (in degrees) is subtended by a 25,000 km diameter sunspot? Assume the sun is 1 .50 × 108 km awayPart (c) what is the image angular size (in degrees) in this telescope?

###### FREE Expert Solution

(a)

Angular Magnification:

$\overline{){\mathbf{M}}{\mathbf{=}}{\mathbf{-}}\frac{{\mathbf{f}}_{\mathbf{o}}}{{\mathbf{f}}_{\mathbf{e}}}}$

fo = R/2 = 2.4m/2 = 1.2m(100cm/1m) = 120 cm

fe = 3.2 cm

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###### Problem Details

Problem 10: A small telescope has a concave mirror with a 2.4 m radius of curvature for its objective. Its eyepiece is a 3.2 cm focal length lens

Randomized Variables

R = 2.4 m

fe = 3.2 cm

Part (a) What is the telescope's angular magnification?

Part (b) What angle (in degrees) is subtended by a 25,000 km diameter sunspot? Assume the sun is 1 .50 × 108 km away

Part (c) what is the image angular size (in degrees) in this telescope?