题目内容（请给出正确答案）

[单选题]

A beam of electrons bombards a sample of hydrogen. Through what potential difference must the electrons have been accelerated if the first line of the Balmer series is to be emitted？（)

A.35.7 V

B.12.1 V

C.0.6 V

D.569.3 V

提问人：网友xiayanwen 发布时间：2022-01-07

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· 有4位网友选择 C，占比50%
· 有2位网友选择 B，占比25%
· 有1位网友选择 D，占比12.5%
· 有1位网友选择 A，占比12.5%

ABCD

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