题目内容

One of the most dangerous aspects of many relationship is ##8##, the feeling that someone you love is attracted to someone else.

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My friend didn’t approve of her parents’ ##9## in her affairs of the heart.

Rochester asks Jane why it’s ##10## for her to leave.

1.已知一单色光照射在钠表面上,测得光电子的最大动能是1.2eV,而钠的红限波长是540nm,那么入射光的波长是

A. 535nm.
B. 500nm
C. 435nm
D. 355nm

2.用频率为ν的单色光照射某种金属时,逸出光电子的最大动能为Ek,若改用频率为2ν的单色光照射此种金属,则逸出光电子的最大动能为

A. hν+Ek
B. 2hν-Ek
C. hν-Ek
D. 2Ek