Scientists in Princeton have broken the speed barrier posed by light and caused a light pulse to travel at many times the speed of light.
A) and caused a light pulse to travel at many times the speed of light.
B) and have caused light pulse to travel at many times the speed of light.
C) and has caused a light pulse to travel at many times the speed of light.
D) and caused light pulses to travel at many times the speed of light.
E) and have enabled a light pulse to travel at many times the speed of light.
why [spoiler]A and not D?[/spoiler]
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riteshbindal
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D is changing the meaning. As per original sentence, scientists have caused "one" (a) light pulse to travel but D says that scientists have caused light pulses. This is not the information given in original sentence. Hence D is incorrectreal2008 wrote:Scientists in Princeton have broken the speed barrier posed by light and caused a light pulse to travel at many times the speed of light.
A) and caused a light pulse to travel at many times the speed of light.
B) and have caused light pulse to travel at many times the speed of light.
C) and has caused a light pulse to travel at many times the speed of light.
D) and caused light pulses to travel at many times the speed of light.
E) and have enabled a light pulse to travel at many times the speed of light.
why [spoiler]A and not D?[/spoiler]
