高中物理光问题求解
\u9ad8\u4e2d\u7269\u7406\u9898\u6c42\u89e3\u5148\u5206\u6790p\u73af\uff0c\u8981\u4f7f\u5b83\u8fbe\u5230\u5e73\u8861\uff0c\u5219\u5fc5\u987b\u7ef3\u5b50\u4e0eOA\u5782\u76f4\uff08p\u53ea\u53d72\u4e2a\u529b\uff09\u4ece\u800c\u627e\u51fa\u7ef3\u5b50\u4e0eOB\u7684\u89d2\u5ea6\uff0c\u518d\u5bf9Q\u8fdb\u884c\u53d7\u529b\u5206\u6790\uff0c3\u4e2a\u529b\u5e73\u8861\uff0c\u89d2\u5ea6\u77e5\u9053\uff0c\u77e5\u9053F\uff0c\u6c42\u51fa\u7ef3\u5b50\u7684\u529b\u4e3aF/sin\u89d2\uff08\u4e0d\u4f1a\u6253\u90a3\u4e2a\u7b26\u53f7\u8036\uff09
\u89e3\uff1a
\u665a\u70b9\u7684\u65f6\u95f4\u5c31\u662f\u5b9e\u9645\u7684\u65f6\u95f4-\u539f\u672c\u5e94\u8be5\u7684\u65f6\u95f4\u3002
\u5b9e\u9645\u65f6\u95f4\u7684\u6c42\u89e3\uff1a\u4ece30m/s\u51cf\u901f\u52300\u6240\u9700\u7684\u65f6\u95f4t=v/a=30/0.6=50s
\u505c\u8f66\u653e\u7f6e\u75c5\u4eba\u7684\u65f6\u95f4\u4e3a\uff1a180s
\u52a0\u901f\u542f\u52a8\u5230\u539f\u6765\u7684\u65f6\u95f4\uff1at=v/s=30/1=30s
\u603b\u7528\u65f6\u95f4\uff1a50s+180s+30s=260s
\u800c\u539f\u672c\u5e94\u8be5\u7528\u591a\u5c11\u65f6\u95f4\u5462\uff1f\u5c31\u662f\u8fd9\u6bb5\u51cf\u901f\u52a0\u901f\u8fc7\u7a0b\u4e2d\u4f4d\u79fb\u76f8\u5bf9\u4e8e\u539f\u6765\u7684\u901f\u5ea6\u5300\u901f\u884c\u9a76\u6240\u82b1\u8d39\u7684\u65f6\u95f4\u3002
\u51cf\u901f\u9636\u6bb5\u4f4d\u79fb\uff1ax=30\u00d750-1/2\u00d70.6\u00d750²=750m
\u52a0\u901f\u9636\u6bb5\u4f4d\u79fb\uff1ax=1/2\u00d71\u00d730²=450m
\u603b\u4f4d\u79fbx=1200m
\u672c\u6765\u5e94\u8be5\u82b1\u8d39\u7684\u65f6\u95f4t=1200/30=40s
\u6240\u4ee5\u665a\u70b9\u7684\u65f6\u95f4t=260s-40s=220s
∵使绿光在垂直入射时反射光完全消失 ∴λ/2=d ∴λ=2d
∵照相机镜头所镀膜对绿光的折射率为n ∴n=fo/f=λ/λo
∴λo=2d/n
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