如图,\(∠AOB=10^{\circ}\),点\(P\)在\(OB\)上\(.\)以点\(P\)为圆心,\(OP\)为半径画弧,交\(OA\)于点\(P_{1}(\)点\(P_{1}\)与点\(O\)不重合\()\),连接\(PP_{1}\);再以点\(P_{1}\)为圆心,\(OP\)为半径画弧,交\(OB\)于点\(P_{2}(\)点\(P_{2}\)与点\(P\)不重合\()\),连接\(P_{1}\) \(P_{2}\);再以点\(P_{2}\)为圆心,\(OP\)为半径画弧,交\(OA\)于点\(P_{3}(\)点\(P_{3}\)与点\(P_{1}\)不重合\()\),连接\(P_{2}\) \(P_{3}\);\(……\)
请按照上面的要求继续操作并探究:
\(∠P_{3}\) \(P_{2}\) \(P_{4}=\) ______ \({\,\!}^{\circ}\);按照上面的要求一直画下去,得到点\(P_{n}\),若之后就不能再画出符合要求点\(P_{n+1}\)了,则\(n=\) ______ .