Electricity has a velocity (that is) as high as light’s.
Electricity has a velocity (that is) as high as light’s is.
These two sentences both seem to be correct to me, but I am in doubt about the second one. If the latter is erroneous, could someone explain why?
Answer
This answer ignores the physics implied by the sentences and focuses only on the English content.
In linguistics, ellipsis (from the Greek: ἔλλειψις, élleipsis, “omission”) or elliptical construction refers to the omission, from a clause, of one or more words that are nevertheless understood in the context of the remaining elements.
– wikipedia
Consider the sentences as elliptical constructions. Here are the sentences with plausible suggestions (in italics) for the ‘omitted’ words:
1a. Electricity has a velocity (that is) as high as light’s velocity.
2a. Electricity has a velocity (that is) as high as light’s velocity is high.
Your question is whether your #2 sentence is erroneous. As the above demonstrates, the sentence is grammatically sound because it provides enough context to fill in the ‘missing’ terms.
Attribution
Source : Link , Question Author : user36339 , Answer Author : Lawrence
