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The physical structure of the human eye enables it to sense light of

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Re: The physical structure of the human eye enables it to sense light of  [#permalink]

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New post 30 Aug 2014, 20:32
usage of "it" - C,D,E out
In B - Making is modifying ???
Hence A- crisp and clear.
Hope it helps:)
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Re: The physical structure of the human eye enables it to sense light of  [#permalink]

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New post 31 Aug 2014, 10:59
In option (D)
'Because' is used with 'however'. Is this correct?

In option (E)
'however' and 'thus' are used in the same sentence. Is this correct?

Please help.

Thanks.
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Re: The physical structure of the human eye enables it to sense light of  [#permalink]

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New post 31 Aug 2014, 18:51
"however" just indicates a contrast from the previous sentence. It is followed (or in some cases, preceded) by a complete complete sentence comprising a subject and a verb. You can remove it from the sentence and the sentence still stands.



The function of "because" is to provide a reason for some fact or event mentioned in the "same" sentence.



So there is no problem with using both "however" and "because" in the same sentence.



"Because" is a conjunction. So if you remove "because", the remaining portion of the sentence cannot stand on its own.



"Thus" introduces a logical outcome of an action (usually specified in the same sentence). So there is no problem with using "however" and "thus" together, either.



Options D and E are incorrect for other reasons.
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Re: The physical structure of the human eye enables it to sense light of  [#permalink]

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New post 06 Dec 2014, 10:48
egmat wrote:
atalwar wrote:
Please explain how reference to it in choice D and E is wrong. IN D,E og says reference to it is not clear. can you highlight this.. is it in these sentences pointing wavelength or infrared (both) ?? how it in B is clear? Is the same error not in B ?


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Hi Aditya,

Let me write the entire sentence taking Option D into consideration.

The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus invisible.

As you can see the pronoun “it” is ambiguous. It can refer to either “wavelength” or “infrared radiation”.

Even if you say that only wavelength can be long and so “it” properly refers to wavelength, then you can say that “thus invisible” is modifying “wavelength” in that case.

The original sentence intends to say that the “infrared radiation” is invisible to the eye because of some reasons. The original sentence doesn’t intend to say that “the wavelength is invisible”.
This is the error in Option D.

Now let us look at the entire sentence taking Option E into consideration.

The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible

Again, the pronoun “it” is ambiguous. (Making radiation invisible or Making wavelength invisible?)

Also the use of “that” is incorrect.
a. Trees which give oxygen are essential for life on earth.
b. Trees that give oxygen are essential for life on earth.

Sentence (a) tells us that trees are essential for life on earth and states a property of trees i.e. Trees give oxygen.
Sentence (b) tells us that only trees that give oxygen are essential for life on earth.
This is the meaning difference between “which” and “that”

The usage of “that” in Option E brings about a similar meaning change. It is talking about “a particular wavelength of 0.1 millimeters that is too long for eye to register”, whereas the original sentence intends to say that “all wavelengths of 0.1 millimeters are too long for eye to register.”

Hope you get the difference in the meanings.
For the reasons above stated, Option E is incorrect too.

Hope this helps! :-)
Regards,
Krishna


Hi Krishna,

Amazing explanation. I had rejected choice D on the basis of "it" and "thus" - somehow thought that "thus" didn't make the right sense here.
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Re: The physical structure of the human eye enables it to sense light of  [#permalink]

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New post 04 Mar 2015, 09:26
egmat wrote:
atalwar wrote:
Please explain how reference to it in choice D and E is wrong. IN D,E og says reference to it is not clear. can you highlight this.. is it in these sentences pointing wavelength or infrared (both) ?? how it in B is clear? Is the same error not in B ?


Image


Hi Aditya,

Let me write the entire sentence taking Option D into consideration.

The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus invisible.

As you can see the pronoun “it” is ambiguous. It can refer to either “wavelength” or “infrared radiation”.

Even if you say that only wavelength can be long and so “it” properly refers to wavelength, then you can say that “thus invisible” is modifying “wavelength” in that case.

The original sentence intends to say that the “infrared radiation” is invisible to the eye because of some reasons. The original sentence doesn’t intend to say that “the wavelength is invisible”.
This is the error in Option D.

Now let us look at the entire sentence taking Option E into consideration.

The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible

Again, the pronoun “it” is ambiguous. (Making radiation invisible or Making wavelength invisible?)

Also the use of “that” is incorrect.
a. Trees which give oxygen are essential for life on earth.
b. Trees that give oxygen are essential for life on earth.

Sentence (a) tells us that trees are essential for life on earth and states a property of trees i.e. Trees give oxygen.
Sentence (b) tells us that only trees that give oxygen are essential for life on earth.
This is the meaning difference between “which” and “that”

The usage of “that” in Option E brings about a similar meaning change. It is talking about “a particular wavelength of 0.1 millimeters that is too long for eye to register”, whereas the original sentence intends to say that “all wavelengths of 0.1 millimeters are too long for eye to register.”

Hope you get the difference in the meanings.
For the reasons above stated, Option E is incorrect too.

Hope this helps! :-)
Regards,
Krishna



A question about your explanation for choice E:

Official Guide explanation says: "Using a restrictive clause suggests that not all wavelengths of 0.1 millimeters are too long for the eye to register."

OK. But in the example that you have written both clauses are indeed restrictive, as both are without commas. So if in the choice E we had "which is too long for the eye ..." instead of "that is too long for the eye ...", then this choice would not have this problem about meaning.

Or no, we essentially need a restrictive clause with commas to make this choice free of such a meaning error?!
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Re: The physical structure of the human eye enables it to sense light of  [#permalink]

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New post 20 Oct 2015, 03:00
egmat wrote:
atalwar wrote:
Please explain how reference to it in choice D and E is wrong. IN D,E og says reference to it is not clear. can you highlight this.. is it in these sentences pointing wavelength or infrared (both) ?? how it in B is clear? Is the same error not in B ?


Image


Hi Aditya,

Let me write the entire sentence taking Option D into consideration.

The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus invisible.

As you can see the pronoun “it” is ambiguous. It can refer to either “wavelength” or “infrared radiation”.

Even if you say that only wavelength can be long and so “it” properly refers to wavelength, then you can say that “thus invisible” is modifying “wavelength” in that case.

The original sentence intends to say that the “infrared radiation” is invisible to the eye because of some reasons. The original sentence doesn’t intend to say that “the wavelength is invisible”.
This is the error in Option D.

Now let us look at the entire sentence taking Option E into consideration.

The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible

Again, the pronoun “it” is ambiguous. (Making radiation invisible or Making wavelength invisible?)

Also the use of “that” is incorrect.
a. Trees which give oxygen are essential for life on earth.
b. Trees that give oxygen are essential for life on earth.

Sentence (a) tells us that trees are essential for life on earth and states a property of trees i.e. Trees give oxygen.
Sentence (b) tells us that only trees that give oxygen are essential for life on earth.
This is the meaning difference between “which” and “that”

The usage of “that” in Option E brings about a similar meaning change. It is talking about “a particular wavelength of 0.1 millimeters that is too long for eye to register”, whereas the original sentence intends to say that “all wavelengths of 0.1 millimeters are too long for eye to register.”

Hope you get the difference in the meanings.
For the reasons above stated, Option E is incorrect too.

Hope this helps! :-)
Regards,
Krishna


Actually i think that e is ambiguous because it could refer to either the eye or the infrared radiation.
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Re: The physical structure of the human eye enables it to sense light of  [#permalink]

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New post 15 Nov 2015, 21:33
Hi E-GMAT,

in the reference to the noun modifier modify the far away noun, i would like to clear my understanding.
Please consider the option B.

(B) however, the wavelength of infrared radiation—0.1 millimeters—is too long to be registered by the eye making it invisible

Although this option is incorrect for other reasons (Pronoun ambiguity).
In the OG13, one of explanation was "making it invisible" is modifying EYE. if i see the sentence structure here (the wavelength ...... is too long ..... by the eye) is a complete clause not comes under the category of noun phrase. So, "making" cant modify "wavelength". Does this makes sense.

Thanks in advance

Regards
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New post 26 Apr 2016, 04:40
Option A , good explanations above
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New post 12 Nov 2016, 10:10
Difficult question. thanks for all your inputs. I learned that the word "that" in option E implies a particular wavelength of certain measurement.

Split1) Logical predication. You have a semicolon just before. That means, I need to have a complete thought in the second part of the sentence. The Ideal way to create a sentence is to have the main noun at the very beginning. That’s why A and C look great with ""infrared radiation"". I do my split focusing on A and C....have not even looked at B, D, or E because that split is not preferred. Could come back to B, D, and E if A or C are out for some reason.

Split2) Now, looking at A and C. they are both pretty similar except that one has ""to be"" while the other one has ""it"". To be is an issue. I got used to GMAT not liking the verb to be in a sentence. But I also know that the pronoun ""it"" does not have a clear referent. So C is out. Why? the GMAT not liking a verb is not the only reason to get rid of A. However, ""it"" not having a clear referent is a clear reason for C to be out.

What happened with C, D, and E? in the real test I would not look for more. I would stop and have selected A as the answer. For practice, let's do the rest.

Split3) in D, ""it"" can refer to both infrared radiation or wavelength => plus you have ""thus"" which is expanding on ""it"". We dont know what ""it"" is talking about in D. In E, has a similar issue with ""it"". In E, the use of ""that"" also implies that the sentence is talking about a specific/particular type of wavelength of some measurement, when in fact we need to talk about all the wavelengths that have the same measurement. As for B. ""it"" does not have a clear referent similar issue with C. "
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Re: The physical structure of the human eye enables it to sense light of  [#permalink]

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New post 14 Jan 2017, 23:11
The physical structure of the human eye enables it to sense light of wavelengths up to 0.0005 millimeters; infrared radiation, however, is invisible because its wavelength—0.1 millimeters—is too long to be registered by the eye.
(A) infrared radiation, however, is invisible because its wavelength—0.1 millimeters—is too long to be registered by the eye - Correct
(B) however, the wavelength of infrared radiation—0.1 millimeters—is too long to be registered by the eye making it invisible - Verb- ing making illogically modifies making
(C) infrared radiation, however, is invisible because its wavelength—0.1 millimeters—is too long for the eye to register it - Pronoun it does not have clear antecedent
(D) however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus invisible - Verb invisible does not make sense
(E) however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible - Illogical contrast

Answer A
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