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infrared radiation

by sadullaevd » Tue May 05, 2009 5:59 am
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

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- 0.1millimeters- is too long for the eye to register it.

Question from the official guide to GMAT.
( no need for D, E options since they are wrong)

Can anyone please explain why to choose C instead of A?
OG shows A as the right answer and does not give sufficient explanation on either A or C options.
thanks in advance, your help will be appreciated.
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Re: infrared radiation

by Vemuri » Tue May 05, 2009 6:39 am
sadullaevd wrote: Can anyone please explain why to choose C instead of A?
OG shows A as the right answer and does not give sufficient explanation on either A or C options.
thanks in advance, your help will be appreciated.
I hope you meant C is the OA. A semicolon separates 2 independendent clauses & hence A & C are worth considering. In A "is too long to be registered by the eye" is not correct. It should be "too long for the eye to register it."
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by rs2010 » Tue May 05, 2009 7:04 am
Edit:

I feel C is correct.

Earlier my reasoning was wrong.
Last edited by rs2010 on Tue May 05, 2009 7:37 am, edited 1 time in total.
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by aj5105 » Tue May 05, 2009 7:06 am
I picked (A). Upon second thoughts i recognized - to be registered by the eye is passive.

Thoughts?
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by cramya » Tue May 05, 2009 12:54 pm
to sense light
to register it

Hence C better than A

As Ajay pointed out active preferred over passive

eye registers
registered by the eye.
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Re: infrared radiation

by sadullaevd » Tue May 05, 2009 4:14 pm
Vemuri wrote:
sadullaevd wrote: Can anyone please explain why to choose C instead of A?
OG shows A as the right answer and does not give sufficient explanation on either A or C options.
thanks in advance, your help will be appreciated.
I hope you meant C is the OA. A semicolon separates 2 independendent clauses & hence A & C are worth considering. In A "is too long to be registered by the eye" is not correct. It should be "too long for the eye to register it."
Well, i really meant A as the OA(above) since OG picks A, personally i see it as C. Cant get why is passive instead of active?Anyway, thanks a lot for your effort.
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by sadullaevd » Tue May 05, 2009 4:23 pm
folks, thanks for sharing your thoughts, however OG shows A as the OA.

anyway, is it possible that OG may have wrong answers?

has anyone seen or heard about any error answer in OG?
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by ajaypatil_am » Tue May 05, 2009 9:42 pm
Since this is the sentence from medical ,technical text passive voice is logical here..

Google the sentence and you may find better expln than what I've mentioned above.

I'll send you link in case I find any.
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by piyush_nitt » Tue May 05, 2009 9:57 pm
ajaypatil_am wrote:Since this is the sentence from medical ,technical text passive voice is logical here..

Google the sentence and you may find better expln than what I've mentioned above.

I'll send you link in case I find any.
IMO it is ambiguous in option C.

"It" can refer to eye as well.

Whats your say guys?
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by mehravikas » Tue May 05, 2009 11:31 pm
I'm with @ piyush_nitt

'it' seems to be ambiguous in option C.
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