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【单选题】
一根长玻璃棒的折射率为 1.6350 ,将它的左端研磨并抛光成半径为 2.50cm 的凸面球。 求玻璃球的光焦度。A.
φ=25.4
B.
φ=35.4
C.
φ=45.4
D.
φ=55.4
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A.
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B.
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C.
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D.
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A.
have finished, would have made
B.
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C.
finished, will make
D.
finish, would have made
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