The physical strcture of the human eye enables it to sense : GMAT Sentence Correction (SC)
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# The physical strcture of the human eye enables it to sense

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The physical strcture of the human eye enables it to sense [#permalink]

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28 Jan 2005, 23:57
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The physical strcture 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
(B) however, the wavelength of infrared radiation - 0.1 millimeters - is too long to be registered by the eye making it invisible
(C) infrared radiation, however, is invisible because its wavelength - 0.1 millimeters - is too long for the eye to register it
(D) however, because the wavelength of infrared radiation is 0.1 millimeters, it is too long for the eye to register and thus invisible
(E) however, infrared radiation has a wavelength of 0.1 millimeters that is too long for the eye to register, thus making it invisible
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29 Jan 2005, 10:30
Must be A
B C and E have ambiguous/improper pronoun "it" referent
D has incorrect sequence of verb linked by conjunction "and"
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29 Jan 2005, 13:48
Can we say "to be registered by the eye" is better than "for the eye to register"?
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29 Jan 2005, 14:10
I have seen this question somewhere and I think the answer is (C)
(A) has a problem.

..infrared radiation, however, is invisible because its wavelength - 0.1 millimeters - is too long to be registered by the eye.

We can make it short like this

..its wavelength is too long to be registered by the eye.

Now, what "be registered by the eye"? "wavelength" or "infrared radiation"?

(A) makes it sound like "wavelength", in fact, "infrared radiation" is "registered by the eye"

(C) sounds clumsy but correct

...infrared radiation, however, is invisible because its wavelength - 0.1 millimeters - is too long for the eye to register it

Obviously, we know "its" is "infrared radiation" . Therefore, the second "it" must be "infrared radiation" as well.

Correct me if I am wrong.
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29 Jan 2005, 19:26
Paul wrote:
Must be A
B C and E have ambiguous/improper pronoun "it" referent
D has incorrect sequence of verb linked by conjunction "and"

Paul, To me "A" seems to be saying that "infrared is invisible", but doesn't make it clear to what or whom infrared is invisible, I found it ambiguous as it was not clear if "infrared" is invisible to the human eye or something or somebody else....any thoughts ?
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30 Jan 2005, 09:33
OA is (A)
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25 Aug 2005, 05:56
But who says the passive voice is always wrong on the GMAT? OA is surprisingly A.
25 Aug 2005, 05:56
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