[填空题]
The Moon’s image appearsf;efs :(g9xxr2 mkqwrjn-( ,u fn ywjc -z;loo5g:12r to be magnified 120$\times$ by a reflecting astronomical telescope with an eyepiece having a focal length of 3.2 $cm$. What are the focal length and radius of curvature of the main (objective) mirror? M = m r = m
