天体物理学视角对教科书相对论的重要性
Importance of an Astrophysical Perspective for Textbook Relativity
摘要:
明确定义狭义相对论中“伽玛暴”的教学的重要性是突出使用一个简单的天体物理的例子,从令人兴奋的当前研究领域的"伽马射线暴“天体物理学。这个例子表明,一个相对论性地向一个静止的观察者移动的光源表现出时间的"收缩“而不是”膨胀“,因为光源和观察者之间的光传播时间随着时间的推移而减少。狭义相对论在天体物理学中的应用补充了理想化的例子和实际的应用,并且非常有效地解释了有限光旅行时间的作用。
英文摘要:
The importance of a teaching a clear definition of the ``observer'' in special relativity is highlighted using a simple astrophysical example from the exciting current research area of ``Gamma-Ray Burst'' astrophysics. The example shows that a source moving relativistically toward a single observer at rest exhibits a time ``contraction'' rather than a ``dilation'' because the light travel time between the source and observer decreases with time. Astrophysical applications of special relativity complement idealized examples with real applications and very effectively exemplify the role of a finite light travel time.
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