(PDF ¥Õ¥¡¥¤¥ë: test2.pdf)

[3](a)

• $\mbox{\boldmath$n$}$ $B$r(B
  
  $$\mbox{\boldmath$n$}=\frac{\displaystyle \frac{\partial \mbo... ...es\frac{\partial \mbox{\boldmath$r$}}{\partial v}\right\vert}$$
  
  
  $B$H$7$F$$$F(B $n_z>0$ $B$NH=JL$r$7$F$$$J$$$b$N!"$"$k$$$O$3$N<0$G$O(B $n_z<0$ $B$K$J$k$N$GEz$($K5^$K(B $-$ $B$r$D$1$k$b$N(B ($B@5$7$/$O1&JU$K(B $\pm$ $B$,$D$-!"$=$N0lJ}$,(B $n_z>0$ $B$rK~$?$9(B)
• $\partial\mbox{\boldmath$r$}/\partial u\times\partial\mbox{\boldmath$r$}/\partial v$ $B$N(B $B7W;;$r(B $\mbox{\boldmath$i$}$, $\mbox{\boldmath$j$}$, $\mbox{\boldmath$k$}$ $B$NE83+$G9T$J$&>l9g$K(B $\mbox{\boldmath$i$}\times\mbox{\boldmath$i$}$ $B$r(B $\mbox{\boldmath$i$}^2$ $B$d(B $\mbox{\boldmath$i$}\mbox{\boldmath$i$}$ $B$J$I$H=q$/$b$N!#(B $B%Y%/%H%k$N@Q$K$OFb@Q!"30@Q$N(B 2 $B $\mbox{\boldmath$a$}\cdot\mbox{\boldmath$b$}$ $B$H(B $\mbox{\boldmath$a$}\times\mbox{\boldmath$b$}$ $B$N5-K!$r@5$7$/(B $B=q$-J,$1$k$Y$-!#(B