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In astronomy the term "red shift" denotes the extent to which light fr

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In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post Updated on: 16 Sep 2018, 16:36
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A
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The Official Guide for GMAT Review 10th Edition, 2003

Practice Question
Question No.: SC 57
Page: 662

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

https://www.nytimes.com/1986/05/06/science/powerful-source-of-gravity-detected-deep-in-the-universe.html

Red shift refers to the extent to which light from a distant galaxy has been shifted toward the red, or long-wave, end of the spectrum by the galaxy's rapid motion away from the Earth. The effect is the same as that which lowers the pitch of the horn on a receding vehicle. The galaxies are receding because the universe is expanding like a swelling cloud of gas.

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Originally posted by devansh_god on 16 May 2007, 06:48.
Last edited by hazelnut on 16 Sep 2018, 16:36, edited 2 times in total.
Formatted the Q.
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 12 Nov 2010, 23:47
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Official explanations:

Choice A is best because it is idiomatic and because its passive verb construction, has been shifted, clearly indicates that the light has been acted upon by the rapid motion. In B, the active verb has shifted suggests that the light, not the motion, is the agency of action, but such a construction leaves the phrase by the rapid motion of the galaxy away from the Earth without any logical or grammatical function. In C, the construction the extent that light is ungrammatical; denotes the extent must be completed by to which. D incorrectly employs an active verb, shifting, and extent of light is imprecise and awkward. E is faulty because it contains no verb to express the action performed by the rapid motion.
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 16 May 2007, 06:51
devansh_god wrote:
hey ppl,
pls explain the answer as well as the eliminations.........

from sc1000 ........... #370

370.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


(A) it is

- the correct use of "the extent to ..."
- must use passive voice here: ... has been shifted ... by the ...
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 16 May 2007, 08:23
but my question still remains the same.......... if u say idioms then y is B wrong?? & y is the use of passive justified here???
pls explain.......
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 16 May 2007, 09:10
devansh_god wrote:
but my question still remains the same.......... if u say idioms then y is B wrong?? & y is the use of passive justified here???
pls explain.......


Passive voice is a "must" here. Hence, (B) is wrong.
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 14 Sep 2009, 11:05
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IMHO it can't be B - we have "by the rapid motion" at the end of sentence, so passive should be used.

Alternatives are A and C. I think its A, because "extent that light ... has been shifted" makes no sense
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 14 Sep 2009, 13:13
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IMO A.

idiom : extent to OR extent of. So D is out.

"has been shifted" is required because of "by" in the second part of the sentence, "... by the rapid montion of ..."
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 14 Sep 2009, 13:24
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noboru wrote:
duttarupam wrote:
IMO A.

idiom : extent to OR extent of. So D is out.

"has been shifted" is required because of "by" in the second part of the sentence, "... by the rapid montion of ..."


dont follow u



We use passive voice, because smthng was done "by rapid motion"...

You cant say that "light has shifted by rapid motion" or "light shifting by rapid motion"..

Maybe wiki article will help you
http://en.wikipedia.org/wiki/English_passive_voice
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 14 Sep 2009, 14:30
agree with A, because later in the sentence it mentioned that the light can not shift itself, this phenomenon is caused by something else...so it has been shifted by galaxies moving away...
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 24 Nov 2009, 12:14
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Confusion lies between A and B

A:LIGHT FROM A DISTANT GALAXY "HAS BEEN" SHIFTED BY XXXXX

TELLS US CLEARLY THAT LIGHT FROM THE GAL WAS MADE TO SHIFT BY THE XXXX

B: LIGHT FROM GAL HAS SHIFTED BY XXXXX

AMBIGUOUSLY DENOTES THAT LIGHT HAS SHIFTED ITSELF BY XXXXX.

A is correct since it conveys the intended meaning precisely
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 24 Nov 2009, 16:14
strait A
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.

we need passive voice
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 24 Nov 2009, 21:09
I disagree with the OA. Saying that "light has been shifted" implies that another force is acting upon it to cause the light to shift. If the only difference is between "has been shifted" and "has shifted" - i think we do not have enough information to adequately determine the meaning of th sentence to know which one is truly correct.

A - Implies that another force has acted upon it to cause the shift.

B - Simply says that the light has shifted, regardless of the cause. This sentence is simpler than A and to me seems better to keep it simple.

jade3 wrote:
sasen wrote:
Confusion lies between A and B

A:LIGHT FROM A DISTANT GALAXY "HAS BEEN" SHIFTED BY XXXXX

TELLS US CLEARLY THAT LIGHT FROM THE GAL WAS MADE TO SHIFT BY THE XXXX

B: LIGHT FROM GAL HAS SHIFTED BY XXXXX

AMBIGUOUSLY DENOTES THAT LIGHT HAS SHIFTED ITSELF BY XXXXX.

A is correct since it conveys the intended meaning precisely


The OA is A

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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 24 Nov 2009, 22:34
jallenmorris wrote:
I disagree with the OA. Saying that "light has been shifted" implies that another force is acting upon it to cause the light to shift. If the only difference is between "has been shifted" and "has shifted" - i think we do not have enough information to adequately determine the meaning of th sentence to know which one is truly correct.

A - Implies that another force has acted upon it to cause the shift.

B - Simply says that the light has shifted, regardless of the cause. This sentence is simpler than A and to me seems better to keep it simple.

jade3 wrote:
sasen wrote:
Confusion lies between A and B

A:LIGHT FROM A DISTANT GALAXY "HAS BEEN" SHIFTED BY XXXXX

TELLS US CLEARLY THAT LIGHT FROM THE GAL WAS MADE TO SHIFT BY THE XXXX

B: LIGHT FROM GAL HAS SHIFTED BY XXXXX

AMBIGUOUSLY DENOTES THAT LIGHT HAS SHIFTED ITSELF BY XXXXX.

A is correct since it conveys the intended meaning precisely


The OA is A



Light….. has been shifted….by the rapid motion of the galaxy.

It is clear that "rapid motion of the galaxy" has acted upon "light" to cause the shift.

Hence IMO the answer is A.
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 26 Nov 2009, 07:26
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jallenmorris wrote:
Why do we need passive voice? On the GMAT, and in general writing, passive voice is bad.

zura wrote:
strait A
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.

we need passive voice


you must avoid passive voice in gmat but still its not 100 % wrong !
as the case with "being"... gmat considers it redundant but still u can face some correct sentences with it...

in A BY in not underline portion of the sentence hints for passive !
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 26 Nov 2009, 07:45
zura wrote:
in A by in not underline portion of the sentence hints for passive !


That's a great point. The sentence would not make sense unless it was passive. That doesn't mean that the sentence is good writing and one a composition professor would approve. I don't like passive sentences, but I think that stems from all the writing courses I've had to take and papers edited and corrected, etc.

What is the source of this question?
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 21 Jul 2010, 22:45
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2
Cut the fluff, the statement reduces to :

(A) light has been shifted.... by the rapid motion of the galaxy

This means that "light" doesnt have a intent to shift on its own. The reason why it shifted is because of the change in wavelength caused by rapid motion of the galaxy [Doppler's effect] rapid motion of the galaxy causing the wavelength to shift to the red end of the spectrum

(B) to which light from a distant galaxy has shifted ---> change of meaning. It means that light shifted on its own irrespective of the "rapid motion" of galaxy.

Gotcha ! Ohh light shifted on its own and Doppler's theory is bull ****. Christian Doppler are you listening to this???? LOL

:-D
noboru wrote:
could anybody elaborate a bit more?
thanks.
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 09 Nov 2010, 06:19
First i picked B, thinking its simpler. But after reading the posts above, A makes more sense.
GMAT doesn't say passive is WRONG. In this case, passive form keeps the meaning clearer.

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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 09 Nov 2010, 06:24
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It is amazing how time away from a question allows a person to view it differently.

The answer is A. In my first post I say something about how "has been shifted" implies that something is causing it to shift "which doesn't make sense". If I had read the question closely, I would have seen that the question includes "by the rapid..." That clearly tells us what is causing the action. A is correct because the sentence includes the necessary information to show what is causing the action.
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 11 Nov 2011, 07:56
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Good question. Narrowed it to A and B and went with B. Got it wrong,
Nice explanation that light has been shifted ( by someone ) rather than light has shifted (on its own ).
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Re: In astronomy the term "red shift" denotes the extent to which light fr  [#permalink]

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New post 13 Nov 2012, 07:42
has been shifted means the shifting has been done by somebody or something.

whereas has shifted means that a change has already occurred.

So i choose B as the shifting was done by something.
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Re: In astronomy the term "red shift" denotes the extent to which light fr &nbs [#permalink] 13 Nov 2012, 07:42

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