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Although the number of large artificial satellites orbiting

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Director
Joined: 05 Jan 2008
Posts: 673
Although the number of large artificial satellites orbiting [#permalink]

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19 Apr 2008, 03:51
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Although the number of large artificial satellites orbiting the Earth is small compared to the number of small pieces of debris in orbit, the large satellites interfere more seriously with telescope observations because of the strong reflections they produce. Because many of those large satellites have ceased to function, the proposal has recently been made to eliminate interference from nonfunctioning satellites by exploding them in space.
This proposal, however, is ill conceived, since _______.

A. many nonfunctioning satellites remain in orbit for years
B. for satellites that have ceased to function, repairing them while they are in orbit would be prohibitively expensive
C. there are no known previous instances of satellites’ having been exploded on purpose
D. the only way to make telescope observations without any interference from debris in orbit is to use telescopes launched into extremely high orbits around the Earth
E. a greatly increased number of small particles in Earth’s orbit would result in a blanket of reflections that would make certain valuable telescope observations impossible
[Reveal] Spoiler: OA

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CEO
Joined: 17 May 2007
Posts: 2902
Re: Although the number of large artificial satellites orbiting [#permalink]

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19 Apr 2008, 04:30
Its a close one between D and E - I go for E but very reluctantly. I'd be interested to see the OE for this.

prasannar wrote:
Although the number of large artificial satellites orbiting the Earth is small compared to
the number of small pieces of debris in orbit, the large satellites interfere more seriously
with telescope observations because of the strong reflections they produce. Because
many of those large satellites have ceased to function, the proposal has recently been
made to eliminate interference from nonfunctioning satellites by exploding them in space.
This proposal, however, is ill conceived, since _______.
A. many nonfunctioning satellites remain in orbit for years [Irrelevant]
B. for satellites that have ceased to function, repairing them while they are in orbit
would be prohibitively expensive [supports]
C. there are no known previous instances of satellites’ having been exploded on
purpose [out of scope]
D. the only way to make telescope observations without any interference from debris
in orbit is to use telescopes launched into extremely high orbits around the Earth [this attacks the plan by finding a potential use for the satellites]
E. a greatly increased number of small particles in Earth’s orbit would result in a
blanket of reflections that would make certain valuable telescope observations
impossible [this attacks the plan by finding dangerous repercussions of the plan]
VP
Joined: 28 Dec 2005
Posts: 1490
Re: Although the number of large artificial satellites orbiting [#permalink]

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19 Apr 2008, 05:53
im almost certain that this one is E.
VP
Joined: 10 Jun 2007
Posts: 1402
Re: Although the number of large artificial satellites orbiting [#permalink]

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19 Apr 2008, 07:15
prasannar wrote:
Although the number of large artificial satellites orbiting the Earth is small compared to
the number of small pieces of debris in orbit, the large satellites interfere more seriously
with telescope observations because of the strong reflections they produce. Because
many of those large satellites have ceased to function, the proposal has recently been
made to eliminate interference from nonfunctioning satellites by exploding them in space.
This proposal, however, is ill conceived, since _______.
A. many nonfunctioning satellites remain in orbit for years
B. for satellites that have ceased to function, repairing them while they are in orbit
would be prohibitively expensive
C. there are no known previous instances of satellites’ having been exploded on
purpose
D. the only way to make telescope observations without any interference from debris
in orbit is to use telescopes launched into extremely high orbits around the Earth
E. a greatly increased number of small particles in Earth’s orbit would result in a
blanket of reflections that would make certain valuable telescope observations
impossible

E. exploding satellite makes more interferences; hence, ill conceived.
Manager
Joined: 19 Aug 2007
Posts: 195
Re: Although the number of large artificial satellites orbiting [#permalink]

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20 Apr 2008, 16:57
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prasannar wrote:
Although the number of large artificial satellites orbiting the Earth is small compared to
the number of small pieces of debris in orbit, the large satellites interfere more seriously
with telescope observations because of the strong reflections they produce. Because
many of those large satellites have ceased to function, the proposal has recently been
made to eliminate interference from nonfunctioning satellites by exploding them in space.
This proposal, however, is ill conceived, since _______.
A. many nonfunctioning satellites remain in orbit for years
B. for satellites that have ceased to function, repairing them while they are in orbit
would be prohibitively expensive
C. there are no known previous instances of satellites’ having been exploded on
purpose
D. the only way to make telescope observations without any interference from debris
in orbit is to use telescopes launched into extremely high orbits around the Earth
E. a greatly increased number of small particles in Earth’s orbit would result in a
blanket of reflections that would make certain valuable telescope observations
impossible

I was stuck between D and E but chose D.

For E to work, we have to assume that exploding them will indeed increase number of small particles IN THE ORBIT that interferes with the telescope observations (what if exploding it allows the particles to be shoot out so far out into space that it may increase the number of small particles but is now in an orbit that wont interfere with the telescope observations so it doesnt matter that the number increased)
where as with D, we can try to modify all the other factors (i.e. remove debris or explode large satellites) but if the problem remains with the telescope itself, doing all of that is not going to make a difference.
Senior Manager
Joined: 29 Jan 2007
Posts: 435
Location: Earth
Re: Although the number of large artificial satellites orbiting [#permalink]

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20 Apr 2008, 23:42
This one is close but I pick E.

because questions is why the idea of exploding is ill conceived..this idea will make problem qouted in D worse but that problem will exist even without this explosion solution.
E is more direct I believe.
Senior Manager
Joined: 16 Aug 2004
Posts: 312
Location: India
Re: Although the number of large artificial satellites orbiting [#permalink]

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21 Apr 2008, 03:28
One more for E, best choice among the available options.
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Joined: 16 Oct 2010
Posts: 8058
Location: Pune, India
Re: Although the number of large artificial satellites orbiting [#permalink]

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04 Jul 2012, 00:06
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Expert's post
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BOOKMARKED
prasannar wrote:
Although the number of large artificial satellites orbiting the Earth is small compared to
the number of small pieces of debris in orbit, the large satellites interfere more seriously
with telescope observations because of the strong reflections they produce. Because
many of those large satellites have ceased to function, the proposal has recently been
made to eliminate interference from nonfunctioning satellites by exploding them in space.
This proposal, however, is ill conceived, since _______.
A. many nonfunctioning satellites remain in orbit for years
B. for satellites that have ceased to function, repairing them while they are in orbit
would be prohibitively expensive
C. there are no known previous instances of satellites’ having been exploded on
purpose
D. the only way to make telescope observations without any interference from debris
in orbit is to use telescopes launched into extremely high orbits around the Earth
E. a greatly increased number of small particles in Earth’s orbit would result in a
blanket of reflections that would make certain valuable telescope observations
impossible

Responding to a pm:

Problem: Debris interferes with telescope observations but a few large satellites interfere more seriously because of strong reflections.
Solution: Explode the satellites. Since large satellites interfere more seriously, convert them to debris. The interference will be reduced since debris causes less interference.

Question: What is the problem with the solution?
(E) A large increases in the number of small particles will create a blanket of reflections. This will cause serious interference with telescope observations. Makes sense. Correct answer.
(D) Doesn't tell us why it is a bad idea to convert satellites to debris. Just says what you should do if you want to get rid of interference completely. Our plan is to decrease interference and this option doesn't tell us why it will not work. We have to focus on the option that tells us exactly why our plan will not work. Our plan is not to completely get rid of interference but to reduce it. We want to improve the observations. It tells us what we can do to make them perfect. But it doesn't say that we will not be able to improve our observations using our solution.
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Senior Manager
Joined: 08 Jun 2010
Posts: 347
Location: United States
Concentration: General Management, Finance
GMAT 1: 680 Q50 V32
Re: Although the number of large artificial satellites orbiting [#permalink]

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04 Jul 2012, 00:17
I agree E is the only solution which points out the problem with the proposal. The argument is awfully wordy. You need to cut the fluff to really get to the crux.
Intern
Joined: 22 Oct 2012
Posts: 23
Concentration: Entrepreneurship, Marketing
Re: Although the number of large artificial satellites orbiting [#permalink]

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14 Jun 2013, 09:52
Debris causes little interference, while satellites causes more.

Little interference is not the problem.....so we can live with debris that goes round merrily.

Hence, D is a good solution, but doesn't help with the main issue....kaput satellites!....so D doesn't address the main issue.

They suggest exploding the satellites....which may cause 'more' debris......'less' debris is ok..more debris may cause more interference....hence ill conceived....E says it all.

Hope this helps
Director
Joined: 04 Jun 2016
Posts: 612
GMAT 1: 750 Q49 V43
Re: Although the number of large artificial satellites orbiting [#permalink]

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09 Jul 2016, 05:57
D is incorrect because, if the only way to make good observations without interference is to launch the telescope into the space itself, then there is no need to explode the satellites in the first place.
E is also a third rate option because "Explode" can mean many things, - a blast that creates small pieces (if this is the case then E is correct), or a blast that generates so much heat that completely vaporises the material (then E is wrong), a blast that creates so much of the momentum that the resulting fragments are thrown away into outer space away from the field of view of the telescope (then this is again wrong)... Also the use of phrase in E "certain valuable telescope observations impossible" restricts it as a good option..

Well, so much for a concise and clear answer.
I will still chose E if i encounter such a silly question in GMAT

prasannar wrote:
Although the number of large artificial satellites orbiting the Earth is small compared to the number of small pieces of debris in orbit, the large satellites interfere more seriously with telescope observations because of the strong reflections they produce. Because many of those large satellites have ceased to function, the proposal has recently been made to eliminate interference from nonfunctioning satellites by exploding them in space.
This proposal, however, is ill conceived, since _______.

A. many nonfunctioning satellites remain in orbit for years
B. for satellites that have ceased to function, repairing them while they are in orbit would be prohibitively expensive
C. there are no known previous instances of satellites’ having been exploded on purpose
D. the only way to make telescope observations without any interference from debris in orbit is to use telescopes launched into extremely high orbits around the Earth
E. a greatly increased number of small particles in Earth’s orbit would result in a blanket of reflections that would make certain valuable telescope observations impossible

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Director
Joined: 12 Nov 2016
Posts: 778
Location: United States
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Re: Although the number of large artificial satellites orbiting [#permalink]

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19 Aug 2017, 17:15
prasannar wrote:
Although the number of large artificial satellites orbiting the Earth is small compared to the number of small pieces of debris in orbit, the large satellites interfere more seriously with telescope observations because of the strong reflections they produce. Because many of those large satellites have ceased to function, the proposal has recently been made to eliminate interference from nonfunctioning satellites by exploding them in space.
This proposal, however, is ill conceived, since _______.

A. many nonfunctioning satellites remain in orbit for years
B. for satellites that have ceased to function, repairing them while they are in orbit would be prohibitively expensive
C. there are no known previous instances of satellites’ having been exploded on purpose
D. the only way to make telescope observations without any interference from debris in orbit is to use telescopes launched into extremely high orbits around the Earth
E. a greatly increased number of small particles in Earth’s orbit would result in a blanket of reflections that would make certain valuable telescope observations impossible

E basically states blowing up these satellites would defeat the purpose of blowing them up because it would just make telescope observations harder- don't swat a fly on your face with a butcher's knife
Manager
Joined: 18 Feb 2017
Posts: 72
Location: India
Schools: ISB '20, IIMA , IIMC
GMAT 1: 650 Q45 V30
GPA: 3.35
Re: Although the number of large artificial satellites orbiting [#permalink]

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05 Apr 2018, 07:17
gmat blows wrote:
prasannar wrote:
Although the number of large artificial satellites orbiting the Earth is small compared to
the number of small pieces of debris in orbit, the large satellites interfere more seriously
with telescope observations because of the strong reflections they produce. Because
many of those large satellites have ceased to function, the proposal has recently been
made to eliminate interference from nonfunctioning satellites by exploding them in space.
This proposal, however, is ill conceived, since _______.
A. many nonfunctioning satellites remain in orbit for years
B. for satellites that have ceased to function, repairing them while they are in orbit
would be prohibitively expensive
C. there are no known previous instances of satellites’ having been exploded on
purpose
D. the only way to make telescope observations without any interference from debris
in orbit is to use telescopes launched into extremely high orbits around the Earth
E. a greatly increased number of small particles in Earth’s orbit would result in a
blanket of reflections that would make certain valuable telescope observations
impossible

I was stuck between D and E but chose D.

For E to work, we have to assume that exploding them will indeed increase number of small particles IN THE ORBIT that interferes with the telescope observations (what if exploding it allows the particles to be shoot out so far out into space that it may increase the number of small particles but is now in an orbit that wont interfere with the telescope observations so it doesnt matter that the number increased)
where as with D, we can try to modify all the other factors (i.e. remove debris or explode large satellites) but if the problem remains with the telescope itself, doing all of that is not going to make a difference.

option D:may be true.but it does not address the plan/conclusion that exploding non functional satellite will decrease the interference
Re: Although the number of large artificial satellites orbiting   [#permalink] 05 Apr 2018, 07:17
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