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40.下列有關「光電效應現象」的敘述,何者正確?(A)即使入射光之頻率高於底限頻率,若光強度小於一定值,則不會產生光電子(B)若入射光之頻率低於底限頻率,則不論光強度多少,一定不會產生光電子(C)不論
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40.下列有關「光電效應現象」的敘述,何者正確?
(A)即使入射光之頻率高於底限頻率,若光強度小於一定值,則不會產生光電子
(B)若入射光之頻率低於底限頻率,則不論光強度多少,一定不會產生光電子
(C)不論入射光頻率多少,光強度越強,光電子數目越多
(D)光電子的動能與入射光的強度成正比。
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