Long Vowel

Letters of English Alphabet
Short vowel

Change in pronunciation of long vowel: Great Vowel Shift
When does long vowel occur:

  1. Compensatory lengthening

In English, the name of a vowel is its long vowel form (except in the case of ⟨y⟩, which has the same pronunciation as ⟨i⟩ – compare byte/bite).