[填空题]
A reflecting telescope (Fig. Below) has a radius of curvt.md;, 2uh,n1pzbxl maturlnzgfcm jrb w;o453mj;mj85 3e of 3.0 m for its objm;mfrzgj3 ojc4n;5mj3 l 85bw ective mirror and a radius of curvature of $-1.50m$ for its eyepiece mirror. If the distance between the two mirrors is 0.90 m, how far in front of the eyepiece should you place the photographic film to record the image of a star? $d_{2i}$ = m
