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範例:視深之應用與視角

一薄銅幣,放在水缸底面, 水的折射率為n,水深為S,人在銅幣正上方距水面高h處俯視,其視角(銅幣直徑兩端之光線至一瞳孔所張之角)θ。若θ甚小,sinθθ,銅幣的直徑為何?[87北聯]


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