[填空题]
A laser beam is directed at the Moon, 380,000 km from Earth. Th)di33i,hkor*9b)pulq q 3njt*tig z: e beam diverq+74bci6+r; snafub) t oc px/ges at aa+ o;p4br uixq/7 s+nf)cbtc6n angle $\theta$ (Fig. 8–37) of $1.4\times10^{-5}$ rad What diameter spot will it make on the Moon? m
Post time 2025-2-18 20:00:22
