(i) A giant refracting telescope at an observatory has an objective lens of focal length 15 m . If an eyepiece of focal length 1.0 cm is used, what is angular magnification of the telescope ?
(ii) If this telescope is used to view the moon, what is the diameter of the image of the moon formed by the objective lens ? the diameter of the moon is `3.48xx10^(6)m`, and the radius of lunar orbit is `3.8xx10^(8) m`.

Explanation

(a) Angular magnification = 1500
(b) Diameter of the image = 13.7 cm.