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A scientist reports the detection of an atomic particle known as a cosmic ray that came toward his ...

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A scientist reports the detection of an atomic particle known as a cosmic ray that came toward his ...

A scientist reports the detection of an atomic particle known as a cosmic ray that came toward his experiment from outer space at a speed of 4 × 105 km s–1. What conclusion can we draw from this report?
A)   He made an error in his experiment because such a speed is considered to be impossible by all previous experiments.
B)   This “particle” must have been a photon or quantum of electromagnetic radiation of very high energy in order to have been traveling this fast.
C)   This result is acceptable since atomic particles can travel this fast, whereas larger bodies are limited to 3 × 105 m s–1.
D)   This is an acceptable result for a particle originating from outer space because particle speed from such regions is unlimited.

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Discovering the Universe

Edition: 7^th

Authors: Kaufmann, Comins

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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein

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