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In astronomy the term red shift denotes the extent to which

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Manager
Joined: 12 Apr 2009
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In astronomy the term red shift denotes the extent to which [#permalink]

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09 Jun 2009, 15:51
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In astronomy the term red shift denotes the extent to which light from a distant galaxy has been shifted toward the red, or long-wave, end of the light spectrum by the rapid motion of the galaxy away from the Earth.

A. to which light from a distant galaxy has been shifted

B. to which light from a distant galaxy has shifted

C. that light from a distant galaxy has been shifted

D. of light from a distant galaxy shifting

E. of the shift of light from a distant galaxy

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09 Jun 2009, 17:51
I am confused between A and B. But because of the phrase "by the rapid motion of the galaxy away from the Earth." so I choose A
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12 Jun 2009, 12:22
A
as explained by ngoctraiden1905
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Manager
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12 Jun 2009, 15:46
nightwing79 wrote:
In astronomy the term red shift denotes the extent to which light from a distant galaxy has been shifted toward the red, or long-wave, end of the light spectrum by the rapid motion of the galaxy away from the Earth.

A. to which light from a distant galaxy has been shifted

B. to which light from a distant galaxy has shifted

C. that light from a distant galaxy has been shifted

D. of light from a distant galaxy shifting

E. of the shift of light from a distant galaxy

I choosed E because all other shift usages make nonsense to me . What's the OA?
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Manager
Joined: 07 Jun 2009
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13 Jun 2009, 03:37
I go for 'E'.

In astronomy the term red shift denotes the extent to which light from a distant galaxy has been shifted toward the red, or long-wave, end of the light spectrum by the rapid motion of the galaxy away from the Earth.

A. to which light from a distant galaxy has been shifted
B. to which light from a distant galaxy has shifted
C. that light from a distant galaxy has been shifted
D. of light from a distant galaxy shifting

E. of the shift of light from a distant galaxy

All other options have grammatical errors.
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13 Jun 2009, 09:27
I would decide against choosing E since it is passive....However I would decide against A as well, Since the presence of "has been" indicates that the shift is caused by someone else....However I would choose B......Please break the suspence and reveal the OA......

aknine wrote:
I go for 'E'.

In astronomy the term red shift denotes the extent to which light from a distant galaxy has been shifted toward the red, or long-wave, end of the light spectrum by the rapid motion of the galaxy away from the Earth.

A. to which light from a distant galaxy has been shifted
B. to which light from a distant galaxy has shifted
C. that light from a distant galaxy has been shifted
D. of light from a distant galaxy shifting

E. of the shift of light from a distant galaxy

All other options have grammatical errors.

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Joined: 07 Jun 2009
Posts: 187

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13 Jun 2009, 23:02
trainspotting wrote:
I would decide against choosing E since it is passive....However I would decide against A as well, Since the presence of "has been" indicates that the shift is caused by someone else....However I would choose B......Please break the suspence and reveal the OA......

aknine wrote:
I go for 'E'.

In astronomy the term red shift denotes the extent to which light from a distant galaxy has been shifted toward the red, or long-wave, end of the light spectrum by the rapid motion of the galaxy away from the Earth.

A. to which light from a distant galaxy has been shifted
B. to which light from a distant galaxy has shifted
C. that light from a distant galaxy has been shifted
D. of light from a distant galaxy shifting

E. of the shift of light from a distant galaxy

All other options have grammatical errors.

Red shift is a natural, continuously occurring phenomena where visible light, after reflection, shifts towards the red end of the spectrum.

If we keep this basic definition in mind and work on the options:
'A' and 'C' would be disregarded because, as correctly pointed, 'has been' indicates that someone else has done the shifting, where as it is a natural process here.
'B' is incorrect because "has shifted" indicates that it is not a continuous process.
(Had the sentence been: '... to which light from a distant galaxy shifts...', then it would have been correct).
The structuring in 'D' is incorrect.
Where as, 'E' gives a general explanation of this phenomena and hence it is correct.

I hope that clears some doubts.
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13 Jun 2009, 23:36
trainspotting wrote:
I would decide against choosing E since it is passive....However I would decide against A as well, Since the presence of "has been" indicates that the shift is caused by someone else....However I would choose B......Please break the suspence and reveal the OA......

aknine wrote:
I go for 'E'.

In astronomy the term red shift denotes the extent to which light from a distant galaxy has been shifted toward the red, or long-wave, end of the light spectrum by the rapid motion of the galaxy away from the Earth.

A. to which light from a distant galaxy has been shifted
B. to which light from a distant galaxy has shifted
C. that light from a distant galaxy has been shifted
D. of light from a distant galaxy shifting

E. of the shift of light from a distant galaxy

All other options have grammatical errors.

Shift is caused by 'the rapid motion of the galaxy away from the Earth'. So 'has been' should be used.
Hence A.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

Consider kudos for the good post ...
My debrief : http://gmatclub.com/forum/journey-670-to-720-q50-v36-long-85083.html

Re: Astronomy   [#permalink] 13 Jun 2009, 23:36
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