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【简答题】
能量为E的光子具有有效质量E/c2，根据等效原理，它通过星球附近时会受到星球质量M的吸引.这个引力很小，可以把它与星球擦边而过的路径近似为折线.试用牛顿力学证明光子路径的偏转角△θ=2GM/Rc2，其是万有引力常数，R是星球半径.
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参考解析：
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【单选题】已知下列单键伸缩振动中 C-C C-N C-O 键力常数 k /(N·cm -1 ) 4.5 5.8 5.0 吸收峰波长 λ/μm 6 6.46 6.85 则 C-C, C-N, C-O 键振动能级之差 ⊿ E 顺序为 ( )
A.
C-C > C-N > C-O
B.
C-N > C-O > C-C
C.
C-C > C-O > C-N
D.
C-O > C-N > C-C
【单选题】已知 C—H 键的键力常数 5.0 N/cm ,则 C—H 振动吸收峰频率为
A.
1523 cm -1
B.
2523 cm -1
C.
2045 cm -1
D.
3045 cm -1
【单选题】已知下列单键伸缩振动中 C-C C-N C-O 键力常数 k /(N·cm -1 ) 4.5 5.8 5.0 吸收峰波长 λ/μm 6 6.46 6.85 问 C-C, C-N, C-O 键振动能级之差 ⊿ E 顺序为
A.
C-C > C-N > C-O
B.
C-N > C-O > C-C
C.
C-C > C-O > C-N
D.
C-O > C-N > C-C
【单选题】Passage One Gravity is a slippery beast. We don’t know how strong it is, how it works or how fast its effects move. But this year we made progress. October saw the most accurate measurem...
A.
Newton and Einstein had similar opinions on the speed of gravity
B.
the author of the passage is in favor of Einstein’s thought about the speed of gravity
C.
astronomers think that both Newton and Einstein were wrong on the speed of gravity
D.
Newton’s thought about the gravitational effect is out of date
【单选题】Gravity is a slippery beast. We don’t know how strong it is, how it works or how fast its effects move. But this year we made progress. October saw the most accurate measurement yet of Newton’s gravit...
A.
two things far apart might vibrate in unison
B.
the ripples in space-time are only imagined
C.
there exist gravitational waves
D.
abrupt, violent cosmic s lead to gravitational waves
相关题目：
【单选题】已知下列单键伸缩振动中 C-C C-N C-O 键力常数 k /(N·cm -1 ) 4.5 5.8 5.0 吸收峰波长 λ/μm 6 6.46 6.85 则 C-C, C-N, C-O 键振动能级之差 ⊿ E 顺序为 ( )
A.
C-C > C-N > C-O
B.
C-N > C-O > C-C
C.
C-C > C-O > C-N
D.
C-O > C-N > C-C
【单选题】最早测定引力常数的是（）
A.
库仑
B.
牛顿
C.
法拉第
D.
卡文迪什
【判断题】同类原子组成的化学键，力常数大，基本振动频率小
A.
正确
B.
错误
【单选题】已知 C—H 键的键力常数 5.0 N/cm ,则 C—H 振动吸收峰频率为
A.
1523 cm -1
B.
2523 cm -1
C.
2045 cm -1
D.
3045 cm -1
【单选题】以下哪项不是牛顿力学的主要内容
A.
惯性和力的概念
B.
力和加速度的关系
C.
力和反作用力的关系
D.
决定论
【单选题】万有引力常数最早是()测定的。
A.
牛顿
B.
卡文迪什
C.
拉瓦锡
D.
开普勒
【单选题】当弹簧的力常数增加一倍时,其振动频率( )
A.
增加 倍
B.
减小 倍
C.
增加0.41倍
D.
增加1倍
【单选题】已知下列单键伸缩振动中 C-C C-N C-O 键力常数 k /(N·cm -1 ) 4.5 5.8 5.0 吸收峰波长 λ/μm 6 6.46 6.85 问 C-C, C-N, C-O 键振动能级之差 ⊿ E 顺序为
A.
C-C > C-N > C-O
B.
C-N > C-O > C-C
C.
C-C > C-O > C-N
D.
C-O > C-N > C-C
【判断题】分子振动频率与化学键力常数成正比。
A.
正确
B.
错误
【单选题】最早测定引力常数的是（）
A.
库仑
B.
牛顿
C.
法拉第
D.
卡文迪什
【判断题】汤川势对引力常数的修正结果 。
A.
正确
B.
错误
【单选题】Passage One Gravity is a slippery beast. We don’t know how strong it is, how it works or how fast its effects move. But this year we made progress. October saw the most accurate measurem...
A.
Newton and Einstein had similar opinions on the speed of gravity
B.
the author of the passage is in favor of Einstein’s thought about the speed of gravity
C.
astronomers think that both Newton and Einstein were wrong on the speed of gravity
D.
Newton’s thought about the gravitational effect is out of date
【单选题】通过量纲分析，引力常数g和腿长l的乘积的几次方是与人步行速率v直接相关的（）。
A.
1.0
B.
2.0
C.
3.0
D.
0.5
【单选题】Gravity is a slippery beast. We don’t know how strong it is, how it works or how fast its effects move. But this year we made progress. October saw the most accurate measurement yet of Newton’s gravit...
A.
two things far apart might vibrate in unison
B.
the ripples in space-time are only imagined
C.
there exist gravitational waves
D.
abrupt, violent cosmic s lead to gravitational waves