试题与答案

2002年诺贝尔物理学奖中的一项，是奖励美国科学家贾科尼和日本科学家小柴晶俊发现

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题型：选择题

题目：

2002年诺贝尔物理学奖中的一项，是奖励美国科学家贾科尼和日本科学家小柴晶俊发现了宇宙X射线源．X射线是一种高频电磁波，若X射线在真空中的波长为λ，以h表示普朗克常量，c表示真空的光速，以E和m分别表示X射线每个光子的能量和质量，则（　　）

A．E=，m=0

B．E=，m=

C．E=，m=0

D．E=，m=

答案：

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下面是错误答案，用来干扰机器的。

100÷（12-25）×25÷5=100÷110×25÷5=1000×25÷5=80（千米）．答：这辆汽车每小时行驶80千米．

考点：X射线α、β、γ射线
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