$5-9$

Problem $5-14$

P$\mathrm{.}5-14$ Consider a plane boundary $($y $=0$ between air $($region $1,41=1)$and

iron $($region $2,$ M$,2=5000).$

a$)$ Assuming B$,=$ a$,2-$a$,10($mT$),$ find B$,$ and the angle that B$,$ makes

with the interface.

Ans: $10000$ax $-10$ay $($mT$)$

b$)$ Assuming B$2=$ a$,10+$ a$,2($mT$),$ find B$,$ and the angle that B$,$ makes

with the normal to the interface.

Ans: $0\mathrm{.}002$ax $+2$a$,($mT$)$