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Vowel usage

General English Grammar & Vocabulary,... » ESL General English Grammar Questions

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Latest post Mon, Jul 31 2006 10:52 PM by CalifJim. 2 replies.
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Anonymous  +  250692 Mon, 31 Jul 06 06:43 AM

Hi

Please advise me regarding the vowel usage in the following sentence:

"The photoluminescence quantum yield of a W-based polymer was 15 times higher than that of an Rh-based one."

Thanks
Anonymous
nona the brit  +  250726 Mon, 31 Jul 06 08:36 AM

Are you asking why 'an' and not 'a'?

An is used before a vowel sound not necessarily an actually written vowel. R is said as 'ar' or 'ah' - starting with an a sound.
nona the brit
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England
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CalifJim  +  250975 Mon, 31 Jul 06 10:52 PM
See Post:52081.

CJ
CalifJim
Joined on Mon, Aug 2 2004
California
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"There are no facts, only interpretations" - Nietzsche
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