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by pradeepkaushal9518 » Thu Jun 17, 2010 4:48 am
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)
(b) and have caused light pulses 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


plz explain
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by martin.jonson007 » Thu Jun 17, 2010 5:00 am
E is correct...!
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by pradeepkaushal9518 » Thu Jun 17, 2010 5:06 am
can u explain yr answer
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by martin.jonson007 » Thu Jun 17, 2010 5:13 am
pradeepkaushal9518 wrote:can u explain yr answer
B and E are only contender ... n diff b/w them is very subtle...

context in sentence is in such a way that word enabled is suitable here than caused... is
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by reply2spg » Thu Jun 17, 2010 7:31 am
Only B and E are contenders. However, E says 'A light pulse', means scientiest have enabled 'A light pulse' to travel. How can they enable for only one pulse to travel? 'A light pulse' should be replaced by 'light pulses' as in B.

Therefore, IMO B
pradeepkaushal9518 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)
(b) and have caused light pulses 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


plz explain
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by pradeepkaushal9518 » Thu Jun 17, 2010 7:35 am
oa is A
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by jube » Thu Jun 17, 2010 7:42 am
IMO contenders are A & D. Parallelism allows for an implicit "have" before caused. I'm not sure how to decide on the singular/plural thing though...
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by reply2spg » Thu Jun 17, 2010 7:42 am
It is surprising. What is the source?
pradeepkaushal9518 wrote:oa is A
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