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Anonymous Posted 20 years ago
Grammar

Vowel usage

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
  

Top answer

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

  • 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.
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2 Answers
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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.
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